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Ruby Jewelry

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Gemstone: Ruby
AIG Certified 15.80 Carats Burma Ruby 2.80 Ct Diamonds 18K Gold Pendant
Located in Massafra, IT
An exquisite pendant in classic design, so original and sophisticated style, a very impressive piece of art . Pendant come in 18K gold with a central natural Burma Ruby , fine quali...
Category

21st Century and Contemporary Ruby Jewelry

Materials

Diamond, Ruby, 18k Gold

Rubies , Diamonds, Rose Gold and Silver Dangle Earrings
Located in Marcianise, Marcianise (CE)
SHIPPING POLICY: No additional costs will be added to this order. Shipping costs will be totally covered by the seller (customs duties included). PS: THIS POLICY IS NOT APPLICABLE ...
Category

2010s Italian Retro Ruby Jewelry

Materials

Diamond, Ruby, 9k Gold, Rose Gold, Silver

Asscher Piecut with a halo of Natural ruby
Located in Bangkok, TH
This pair of earrings is made with 0.80 carat diamonds in composite setting giving a look of 4 carat pair. VVS clarity ,EF color diamonds are used with natural ruby halo. Extremely l...
Category

2010s Thai Art Deco Ruby Jewelry

Materials

Ruby, 14k Gold, 18k Gold

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K rose gold exhibiting a fine combination of the rich red hue and ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K yellow gold exhibiting a fine combination of the rich red hue an...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in Platinum
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in platinum exhibiting a fine combination of the rich red hue and the s...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K rose gold exhibiting a fine combination of the rich red hue and ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K rose gold exhibiting a fine combination of the rich red hue and ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K yellow gold exhibiting a fine combination of the rich red hue an...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in 14K White Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K white gold exhibiting a fine combination of the rich red hue and...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K rose gold exhibiting a fine combination of the rich red hue and ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Round 0.68ct Ruby Stud Earrings with Diamond in 14K White Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K white gold exhibiting a fine combination of the rich red hue and...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K yellow gold exhibiting a fine combination of the rich red hue an...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in Platinum
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in platinum exhibiting a fine combination of the rich red hue and the s...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Round 1.20ct Ruby Stud Earrings with Diamond in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby solitaire stud earrings are accented with twinkling diamonds at the base. They are crafted in 14K yellow gold exhibiting a fine combination of the rich red hue an...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k rose gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a captiv...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Oval 1.20ct Ruby Studs with Diamond Halo in Platinum
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in platinum. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July and tra...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Oval 0.80ct Ruby Studs with Diamond Halo in Platinum
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in platinum. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July and tra...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k rose gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a captiv...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k yellow gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capt...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural Oval 0.80ct Ruby Studs with Diamond Halo in 14K White Gold
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in 14k white gold. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Oval 1.20ct Ruby Studs with Diamond Halo in 14K White Gold
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in 14k white gold. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k rose gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a captiv...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural Oval 1.20ct Ruby Studs with Diamond Halo in Platinum
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in platinum. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July and tra...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Oval 0.80ct Ruby Studs with Diamond Halo in Platinum
Located in Los Angeles, CA
This luxurious pair of ruby halo stud earrings is designed in platinum. The oval red gems are surrounded by a dazzling halo of round diamonds. Ruby is the Birthstone for July and tra...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k rose gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a captiv...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K Rose Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k rose gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a captiv...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

Natural Pear Ruby Drop Earrings with Diamond in 14K Rose Gold Size-6x4mm
Located in Los Angeles, CA
Designed in 14k rose gold, these ruby drop earrings exude sophisticated charm. The pear shaped ruby is topped by a glimmering diamond that adds to the beauty of these lever back earr...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

Natural Pear Ruby Drop Earrings with Diamond in 14K Rose Gold Size-6x4mm
Located in Los Angeles, CA
Designed in 14k rose gold, these ruby drop earrings exude sophisticated charm. The pear shaped ruby is topped by a glimmering diamond that adds to the beauty of these lever back earr...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold

Natural Pear Ruby Drop Earrings with Diamond in 14K Yellow Gold Size-6x4mm
Located in Los Angeles, CA
Designed in 14k yellow gold, these ruby drop earrings exude sophisticated charm. The pear shaped ruby is topped by a glimmering diamond that adds to the beauty of these lever back ea...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

Natural Heart Shaped Ruby Earrings with Diamond in 14KYellow Gold (Size-4mm)
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k yellow gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold, Gold

Natural Pear Ruby Drop Earrings with Diamond in 14K White Gold Size-6x4mm
Located in Los Angeles, CA
Designed in 14k white gold, these ruby drop earrings exude sophisticated charm. The pear shaped ruby is topped by a glimmering diamond that adds to the beauty of these lever back ear...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Heart Shaped 1.10ct Ruby Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k rose gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in 14KWhite Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k white gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold, Gold

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural 0.72ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in 14KYellow Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k yellow gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold, Gold

ANGARA Natural and Oval 1.20ct Ruby Dangle Earrings with Diamond in Platinum
Located in Los Angeles, CA
These ruby long drop earrings are designed in platinum with the round and oval rubies secured in prong settings. The gems are connected by a metal loop for a unique and stylish look....
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Heart Shaped 1.10ct Ruby Earrings with Diamond in 14KYellow Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k yellow gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold, Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k rose gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

ANGARA Natural 0.72ct Ruby and Diamond J-Hoop Earrings in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k yellow gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capt...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k yellow gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capt...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in 14KWhite Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k white gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold, Gold

ANGARA Natural and Oval 1.20ct Ruby Dangle Earrings with Diamond in 14KWhiteGold
Located in Los Angeles, CA
These ruby long drop earrings are designed in 14k white gold with the round and oval rubies secured in prong settings. The gems are connected by a metal loop for a unique and stylish...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold, Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in Platinum
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in platinum. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a twink...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural Heart Shaped 1.10ct Ruby Earrings with Diamond in 14KWhite Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k white gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold, Gold

ANGARA Natural Heart Shaped 1.10ct Ruby Earrings with Diamond in 14KWhite Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k white gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold, Gold

ANGARA Natural Heart Shaped 1.10ct Ruby Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k rose gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in 14k rose gold. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

ANGARA Natural Heart Shaped 0.60ct Ruby Earrings with Diamond in Platinum
Located in Los Angeles, CA
These solitaire ruby drop earrings are designed with a dash of exquisiteness in platinum. The heart-shaped radiant red ruby is gracefully suspended from a lustrous twist with a twink...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K Yellow Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k yellow gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capt...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Yellow Gold

ANGARA Natural 0.40ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural and Oval 1.20ct Ruby Dangle Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These ruby long drop earrings are designed in 14k rose gold with the round and oval rubies secured in prong settings. The gems are connected by a metal loop for a unique and stylish ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

ANGARA Natural 1.20ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

Natural and Oval 1.20ct Ruby Dangle Earrings with Diamond in Platinum
Located in Los Angeles, CA
These ruby long drop earrings are designed in platinum with the round and oval rubies secured in prong settings. The gems are connected by a metal loop for a unique and stylish look....
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Platinum

ANGARA Natural 0.72ct Ruby and Diamond J-Hoop Earrings in 14K White Gold
Located in Los Angeles, CA
These stunning ruby and diamond hoop earrings are exquisitely crafted in 14k white gold. The J hoops are alternately studded with bright red rubies and sparkling diamonds for a capti...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, White Gold

ANGARA Natural and Oval 1.20ct Ruby Dangle Earrings with Diamond in 14KRose Gold
Located in Los Angeles, CA
These ruby long drop earrings are designed in 14k rose gold with the round and oval rubies secured in prong settings. The gems are connected by a metal loop for a unique and stylish ...
Category

21st Century and Contemporary American Modern Ruby Jewelry

Materials

Diamond, Ruby, Rose Gold, Gold

Vintage and Antique Ruby Jewelry for Sale on 1stDibs

This deep red gem is the color of heat and passion — vintage and antique ruby jewelry is perfect for those born in the middle of summer.

Rubies are one of the few gemstones that can give diamonds a run for their money. Just consider the Van Cleef & Arpels “scarf” necklace the Duke of Windsor presented to the Duchess on her 40th birthday, in 1936 — set with diamonds and dripping with rubies, a testament to the deep-red gemstone’s power — or the slippers encrusted with 4,600 rubies that Harry Winston made to commemorate The Wizard of Oz’s golden anniversary. July babies have permission to adorn themselves with this beautiful red stone even when it’s not their birthday.

Rubies are considered precious stones — along with diamonds, sapphires and emeralds — and have a hardness of 9.0 on the Mohs Scale, surpassed only by Moissanite and diamonds. They are composed of corundum, a colorless mineral that is also the basic material of sapphires. In the July birthstone, the red of the gemstone — and the various hues seen in sapphires — are produced by the presence of trace elements. In the case of a ruby, this element is chromium. Rubies range in color from vermilion to a violet red. They are also pleochroic, which means that a stone’s hue can vary depending on the direction of viewing. The most sought-after color is pigeon’s blood: pure red with a hint of blue.

Rubies that are hosted in dolomite marble are the most prized: Because the marble is low in iron, so are the rubies, resulting in a more intense color. Rubies found in basalt, which has a higher iron content, are generally darker and less intense.

When shopping for antique and vintage ruby jewelry, remember that the 4Cs of selecting the perfect diamond — color, clarity, cut and carat — also apply to rubies.

According to the Gemological Institute of America, the color of the July birthstone should be a vibrant to slightly purplish red, and the stone should be clear and inclusion-free. Accordingly, the cut should show off its color and clarity. As for the last criterion, fine rubies more than a carat in weight are rare. Often, large rubies are more expensive than diamonds of comparable weights.

Find a collection of ruby necklaces, ruby rings and other accessories on 1stDibs.

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