Unheated 1.54 carats Mozambique Ruby
Located in Khet Bang Rak, 10
Unheated 1.54 carats Mozambique octagonal square ruby, a perfect size for an engagement ring or a special pendant to be made. Rubies are known as the king of gems, and these rubies ...
Ruby
$3,300 / item
1.24 Carat Octagon Mozambique Ruby
Located in Khet Bang Rak, 10
This 1.24 carat octagon-cut Mozambique ruby displays a rich, well-balanced color and strong clarity, reflecting its good overall quality. Octagon rubies are less commonly found and...
Ruby
Certified faceted ruby, 0.46 cts
By True Gems
Located in บางรัก, TH
Certified faceted ruby sku212 Weight: 0.46 cts Size: 4.90х4.02х2.50 mm GFCO laboratory certificate
Ruby
Certified faceted ruby, 0.68 cts
By True Gems
Located in บางรัก, TH
Certified faceted ruby sku209 Weight: 0.68 cts Size: 5.24х4.23х3.54 mm GFCO laboratory certificate
Ruby
Certified faceted ruby, 0.54 cts
By True Gems
Located in บางรัก, TH
Certified faceted ruby sku208 Weight: 0.54 cts Size: 5.22х4.21х3.07 mm Vivid saturated pink-red color GFCO laboratory certificate
Ruby
Unheated Natural Mozambique Ruby – 2.03 Carats
Located in Khet Bang Rak, 10
Its balanced proportions and lively glow make it an exceptional gemstone of both rarity and presence. Set into fine jewellery, this ruby would create a powerful focal point—whether ...
Ruby
Mozambique Ruby Cushion Cut – 2.09 Carats
Located in Khet Bang Rak, 10
Its balanced proportions and lively glow make it an exceptional gemstone of both rarity and presence. Set into fine jewellery, this ruby would create a powerful focal point—whether ...
Ruby
Heart-Shaped Ruby Cts 1.27
Located in Hong Kong, HK
Get ready to fall in love with this 1.27 carat Heart-Shaped Ruby's classic elegance. This ruby, which is fashioned into the alluring shape of a heart, represents romance, love, and ...
Ruby
$2,400Sale Price|20% Off
Rare untreated ruby oval 9mm certified
Located in Jupiter, FL
Rare untreated ruby, heat only, stunning color! NATURAL GEMSTONE(S): NATURAL RUBY Clarity/Color: Slightly Included/Pinkish Red Cut: Rectangular 9X6.5MM Treatment: none pof WHAT Y...
Ruby
GIA Certified Burma Ruby Vivid Red "Pigeon's Blood" 0.49 Half-Carat Loose Ruby
By Gad & Co.
Located in Miami, FL
Center Stone Details: Gemstone Type: Ruby Carat: 0.49 carats Cut: Oval Color: Vivid Red "Pigeon's Blood" Measurements: 5.12 x 4.10 x 2.70 mm Treatment: Heated (Low Residues) Certifi...
Ruby
4.61 Carats Unheated Untreated Natural Ruby
Located in Brisbane, AU
Natural Ruby Weight: 4.61 Carats Dimension: 8.86 x 7.70 x 6.54 Mm Shape: Cushion Origin: Mozambique Treatment: None Certificate: AIG Certified
Ruby
2.55 ct Mozambique Unheated PigeonBlood Ruby
Located in Guangzhou, CN
2.55 ct Mozambique unheated pigeon blood ruby.Comes with certificate; GRS report can be provided upon request.Excellent condition, inclusions invisible to the naked eye.Inclusions ar...
Ruby
3.01 Carat Mozambique Ruby, Oval Cut
Located in Khet Bang Rak, 10
A 3.01 carat Mozambique ruby showcasing a rich, vivid red color with natural internal characteristics that highlight its authenticity. The oval cut enhances the stone’s brilliance, a...
Ruby
2.09 Carat Mozambique Ruby - Pear Cut
Located in Khet Bang Rak, 10
Heated 2.09 carats Mozambique pear shaped ruby, a perfect size for an engagement ring or a special pendant to be made. Rubies are known as the king of gems, and these rubies are sou...
Ruby
2.03 Carats Mozambique Ruby - oval cut
Located in Khet Bang Rak, 10
Heated 2.03 carats Mozambique ruby, a perfect size for an engagement ring or a special pendant to be made. Rubies are known as the king of gems, and these rubies are sourced from et...
Ruby
3.09 Carat Mozambique Ruby - Cushion Cut
Located in Khet Bang Rak, 10
A 3.09 carat Mozambique ruby — an ideal size for a refined ring or pendant. Rubies are known as the king of gems. This stone comes from the Montepuez mines and was purchased through...
Ruby
Natural Siam Ruby (Thailand) 0.68ct No-Heat
Located in Nicosia, Cyprus
Details • Gemstone: Natural Ruby • Cut: oval • Weight: 0.68 ct • Origin: Siam (thailand) • Treatment: No treatement / no-heat • Dimensions: 5.6 x 4.2 x 3 • Certificate: Not in...
Ruby
$7,400 / set
Ruby Oval Pair Unheated – 2.96 ct
Located in Khet Bang Rak, 10
This matching pair of oval-cut unheated rubies, with a combined weight of 2.96 carats, displays a rich, well-balanced color and strong clarity, reflecting their good overall quality....
Ruby
GIA Certified No Heat Cushion Ruby
Located in Great Neck, NY
GIA Certified Cushion Ruby 1.36 cts (7.25x6.80x3.00) mm NO HEAT
Ruby
11 Ruby Heart Cabochons Cts 9.17
Located in Hong Kong, HK
Sourced from Myanmar, these natural rubies are known for their vibrant color and durability.
Ruby
2.37 Carat Natural Unheated Ruby, Round Cut
Located in Khet Bang Rak, 10
What sets this ruby apart is that it is completely unheated, a rare and valuable characteristic in the world of fine gemstones.
Ruby
Natural Unheated Red Mozambique Gemstone 1.24 carats with GIA Report
Located in Los Angeles, CA
With a modest carat weight, oval shape, and untreated nature, this Unheated Mozambique Ruby stands as an appealing and valuable gemstone, suitable for diverse jewelry designs or as a...
Ruby
$35,739Sale Price|44% Off
GFCO Certified 3.63 Carats Untreated Mozambique Ruby
Located in New Delhi, Delhi
A very stunning GFCO certified natural Untreated Ruby from Mozambique, in oval cut, of 3,63 carats, extra fine quality, spectacular color. It is a investment stone. Very rare stone. ...
Ruby
$3,120Sale Price|20% Off
9.2mmx7mm Oval ruby pair natural and untreated
Located in Jupiter, FL
Rare matching pair of rubies, untreated and certified. NATURAL GEMSTONE(S): NATURAL RUBY Clarity/Color: Slightly Included/Pinkish Red Cut: Rectangular 9.2mmx7mm Treatment: none RPK...
Ruby
$2,320Sale Price|20% Off
Oval Ruby Loose unset 9mm oval untreated
Located in Jupiter, FL
Unset loose ruby certified, will come with a box. NATURAL GEMSTONE(S): RUBY Clarity/Color: Slightly Included/Pinkish Red Cut: Rectangular 9mm x 7.1mm Treatment: heat only WHAT YOU...
Ruby
$6,212Sale Price|40% Off
Exceptional 1.10 carats Unheated Ruby - Swiss Certified
Located in London, GB
💎 Direct-from-source gemstones — no middlemen, just exceptional value.
Ruby
Unheated 1.11ct Burma Ruby No Heat GIA Certificate - Superb!
Located in bangkok, TH
An absolutely magnificent, absolutely superb quality unheated, untreated ruby from the famed gem mines of Myanmar Burma weighing 1.11ct. Gorgeous shade of deeply saturated slightly p...
Ruby
2.03 carat Unheated Mozambique Ruby Ethically Sourced
Located in Khet Bang Rak, 10
Unheated 2.03 carats Mozambique ruby elongated cushion, a perfect size for a ring or a pendant to be custom made. Rubies are known as the king of gems, and these rubies are sourced ...
Diamond, Ruby
0.53 сt, Vivid red-pink unheated ruby
By True Gems
Located in บางรัก, TH
Vivid red-pink unheated ruby sku830 Weight: 0.53 ct Color: pink Size: 5.18 x 4.36 x 2.55 mm Origin: Mozambique Perfect cut, GFCO certificate
Ruby
GIA Certified No Heat Cushion Ruby
Located in Great Neck, NY
GIA Certified No Heat Ruby Cushion Shape 1.23 cts (7.55x6.06x2.61) mm
Ruby
7 Flower Ruby Round Carving Cts 15.23
Located in Hong Kong, HK
Featuring 7 exquisite ruby flower carvings (15.23 cts, no heat). Sourced from Myanmar, these natural rubies radiate warmth and passion, symbolizing love, vitality, and strength.
Ruby
Loose Ruby - Oval .76ct Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat(s): .76ct Cut: Oval Color: Red Size: (mm) 7.07 x 5.12 x 2.73 Stone Note: (likely African origin) Condition: New
Ruby
Loose Ruby - Oval .74ct Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat(s): .74ct Cut: Oval Color: Red Size: (mm) 6.85 x 4.81 x 2.77 Condition: New
Ruby
1.22 сts, Vivid red-pink unheated ruby
By True Gems
Located in บางรัก, TH
Vivid red-pink unheated ruby sku832 Weight: 1.22 ct Color: red-pink Size: 5.11x4.91x2.58 mm, 4.79x4.74x2.54 mm Origin: Mozambique Perfect cut, GFCO certificate
Ruby
0.61 сt, Vivid red-pink unheated ruby
By True Gems
Located in บางรัก, TH
Vivid red-pink unheated ruby sku831 Weight: 0.61 ct Color: red-pink Size: 6.26 x 3.79 x 2.40 mm Origin: Mozambique Perfect octagon cut, GFCO certificate
Ruby
$1,600Sale Price|20% Off
Rare ruby oval cabochon pair matching pair 8.8mm
Located in Jupiter, FL
Rare matching pair of rubies, untreated and certified. NATURAL GEMSTONE(S): NATURAL RUBY Clarity/Color: Slightly Included/Pinkish Red Cut: Rectangular 8.8x7mm Treatment: none (heat...
Ruby
2 Burmese Oval-Shaped Rubies Cts 1.65
Located in Hong Kong, HK
Two captivating oval-shaped rubies, weighing a total of 1.65 carats, are ready to be transformed into an exquisite piece of jewelry.
Ruby
$5,177Sale Price|50% Off
Beautiful, Untreated 1.17ct Pinkish-Red Ruby - Swiss Certified
Located in London, GB
💎 Direct-from-source gemstones — no middlemen, just exceptional value.
Ruby
2 Hexagon-Shaped Ruby Carvings Cts 17.47
Located in Hong Kong, HK
Crafted into exquisite hexagonal shapes and carved with delicate flower designs, these rubies are more than just gemstones—they're works of art.
Ruby
1.15ct Ruby Burma pendant in 18ct white gold.
Located in London, GB
1.15ct Ruby Burma pendant in 18ct white gold. Natural untreated ruby gemstone oval shaped vivid pink colour 1.15ct total weight in 18k white gold Vivid ruby gemstone intense red co...
Ruby, White Gold
Natural Unheated Mozambique Ruby 1.44 carats with GIA Report
Located in Los Angeles, CA
Cushions have a soothing appeal, their soft edges and well-positioned facets, seem to bring out the color of the gemstone brilliantly. This 1.44 carat cushion cut Ruby is one pick th...
Ruby
Pair of Natural Siam Rubies (Thailand) 0.75ct No-Heat
Located in Nicosia, Cyprus
, Details • Gemstone: Natural Rubies • Cut: Pear • Weight: 0.75 ct • Origin: Siam (thailand) • Treatment: No treatment / no-heat • Dimensions: 6 x 4 x 1.8 • Certificate: Not i...
Ruby
Natural Unheated Mozambique Ruby 1.53 carats with GIA Report
Located in Los Angeles, CA
An oval shaped that has been fashioned to bring out the beauty of the gem; this Ruby has been mined in Mozambique. With crimson red that fills this gem it is the perfect choice if yo...
Ruby
3.25 Ct GIA Certificate Natural ruby unheated purplish Red color
Located in bangkok, TH
RMA117 GIA Certificate Natural ruby unheated Purplish Red color eye clean quality Vietnam Gemstone GEM DESCRIPTION Species : Natural Corumdum Variety: Natural Ruby unheated We...
Ruby
Sapphire, Ruby, and Emerald Cabochons Cts 39.54
Located in Hong Kong, HK
This exquisite collection of 80 sapphire, ruby, and emerald cabochons, totaling 39.54 carats.
Emerald, Ruby, Sapphire
Natural Unheated Mozambique Ruby 1.52 carats with GIA Report
Located in Los Angeles, CA
A gem that has a royal red, this pear cut Ruby can be a great centerpiece for an engagement ring.
Ruby
Natural Unheated Mozambique Ruby 1.09 carats with GIA Report
Located in Los Angeles, CA
Mined in Mozambique, here is an electrifying Ruby that boasts a natural blood red color. Symbolic of passion and love, this gemstone is an ideal choice for today’s modern bride, look...
Ruby
GIA-Certified Burma Ruby Heated Treatment Pear Shape 1.7Ct – 7.79x6.91x4.22mm
Located in Columbus, OH
Sourced from the prestigious Burma region, known for producing some of the world’s finest rubies, this gemstone is a true testament to nature’s artistry.
Ruby
0.66 сt, Vivid red-pink unheated oval ruby
By True Gems
Located in บางรัก, TH
Vivid red-pink unheated oval ruby sku829 Weight: 0.66 ct Color: pink Size: 6.43 x 4.99 x 2.55 mm Origin: Mozambique Perfect cut, GFCO certificate
Ruby
Unheated Mozambique Ruby 2.35 carats certified by GUILD
Located in Khet Bang Rak, 10
Unheated 2.35 carats Mozambique pear shaped ruby, a perfect size for a engagement ring or a special pendant to be made. Rubies are known as the king of gems, and these rubies are so...
Ruby
Exceptional Untreated 2.03ct Mozambique Pigeon's Blood Ruby, Swiss Certified
Located in London, GB
Each of our gemstones represents the top 1% of untreated rubies and sapphires, sourced through four generations of heritage in the precious gemstone trade.
Ruby
0.98 Ct GRS Certificate Natural Burma Ruby No heated Red color
Located in bangkok, TH
RMA127 GRS Certificate Natural Burma Ruby Unheated red color round shape gemstone GEM DESCRIPTION Species: Natural Corumdum Variety: Natural Ruby Unheated Weight: 0.98ct Colo...
Ruby
$10,354Sale Price|50% Off
Exceptional Untreated 1.51 carats Vivid Red Ruby - Swiss Certified
Located in London, GB
This exceptional, untreated and stunningly beautiful 1.51 carats Pigeon's Blood red ruby originates from Mozambique, one of the leading modern sources of fine quality rubies.
Ruby
Loose Ruby - Oval .74ct Pinkish Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat: .74ct Cut: Oval Color: Pinkish Red Size (mm): 5.79 x 4.64 x 2.68 Condition: New without Tags
Ruby
Loose Ruby - Oval .81ct Pinkish Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat(s): .81ct Cut: Oval Color: Pinkish Red Size: (mm) 6.09 x 4.62 x 2.94 Condition: New
Ruby
Loose Ruby - Oval .80ct Pinkish Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat: .80ct Cut: Oval Color: Pinkish Red Size (mm): 6.85 x 5.00 x 3.26 Stone Note: (moderate residue) Condition: New without Tags
Ruby
Loose Ruby - Cushion 1.05ct Pinkish Red Solitaire
Located in Greensboro, NC
Treatment: Heating Carat: 1.05ct Cut: Cushion Color: Pinkish Red Size (mm): 6.84 x 5.36 x 2.44 Condition: New
Ruby
1.05 cts, Certified unheaat faceted pigeon blood ruby
By True Gems
Located in บางรัก, TH
Certified unheaat faceted pigeon blood ruby sku672 Weight: 1.05 cts Size: 9.02х4.37х2.92 mm Color: pigeon blood red Origin: Mozambique Pear shape GFCO certified
Ruby
$11,596Sale Price|30% Off
Exceptional, Untreated 1.56 carat Pigeon's Blood Ruby - Swiss Certified
Located in London, GB
Certified by Gem Research Swisslab (GRS), this beautiful ruby displays the highly sought-after Pigeon's Blood colour — a deep and vivid red that is considered the pinnacle of color g...
Ruby
1.27 Carat GIA Certified Oval No Heat Ruby
Located in Great Neck, NY
GIA Certified Oval Ruby 1.27 Carats (7.70x6.17x2.79) mm NO HEAT
Ruby
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.