Carved Blue Tanzanite & Ruby Diamond Art Deco Style White Gold Pin Brooch
By Unbranded
Located in Tysons, VA
Accent Gemstones I Type: Ruby Shape: French Cut Number: 56 Weight: 4.60 Carat (approx.)
Diamond, Ruby, Tanzanite, 18k Gold, White Gold
Art Deco Style Diamond & Red Pink Ruby Halo Set 14K White Gold Pendant
By Unbranded
Located in Tysons, VA
Accent Gemstones I Type: Ruby Shape: French Cut Average Color: Pink Number: 14 Weight: 0.72 Carat (approx. total weight) Accent Gemstones II Type: Diamond Shape: Round Brilliant Cut ...
Diamond, Ruby, 14k Gold, White Gold
Art Deco Style Red Pink Ruby & Diamond 18K White Gold Unique Tennis Bracelet
By Unbranded
Located in Tysons, VA
(approx. in total) Gemstones I Type: Ruby Shape: French Cut Number: 42 Weight: 7.08 Carat (approx. in total) Gemstones II Type: Diamond Shape: Round Brilliant Average Color: H-J Aver...
Diamond, Ruby, 18k Gold, White Gold
Art Deco Design Red Pink Ruby & Diamond 14K White Gold Tennis Line Bracelet
By Unbranded
Located in Tysons, VA
(approx. in total) Clasp: Push Clasp Gemstones I Type: Ruby Shape: French Cut Size: 1.7 mm. Number: 76 Weight: 3.80 Carat (approx. in total) Gemstones II Type: Diamond Shape: Round A...
Diamond, Ruby, 14k Gold, White Gold
Diamond & Ruby Art Deco Inspired Style Bar Drop 14K White Gold Dangle Earrings
By Unbranded
Located in Tysons, VA
(approx. total weight) Backing: Push Back Gemstones I Type: Ruby Shape: French Cut Size: 1.7 mm. Number: 38 Weight: 1.90 Carat (approx. total weight) Gemstones II Type: Diamond Shape...
Diamond, Ruby, 14k Gold, White Gold
$3,600Sale Price / item|20% Off
Ruby Diamond Floral Cluster Stud Earrings in 18K White Gold
Located in Bangkok, TH
Number: 20 Weight: 0.70 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 80 Weight: 2.34 Carat (approx. total weight) These earrings will be made...
Diamond, Ruby, Gold, 18k Gold, White Gold
Diamond Baguette Ruby Openwork Pendant in 14K White Gold
Located in Bangkok, TH
Number: 1 Weight: 0.07 Carat (approx. total weight) Accent Gemstones I Type: Ruby Shape: French Cut Number: 4 Weight: 0.22 Carat (approx. total weight) Accent Gemstones II Type: Di...
Diamond, Ruby, 14k Gold, White Gold
Diamond & Ruby Art Deco Style 14K White Gold Ring
By Unbranded
Located in Tysons, VA
Number: 1 Weight: 0.11 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Size: 1.3 mm. Number: 12 Weight: 0.24 Carat (approx. total weight) Accent Gemstones...
Diamond, Ruby, 14k Gold, White Gold
Diamond Baguette Ruby Openwork Ring in 18K White Gold
Located in Bangkok, TH
Number: 1 Weight: 0.17 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 4 Weight: 0.82 Carat (approx. total weight) Accent Gemstones Type: Diamo...
Ruby, Diamond, White Gold, 18k Gold
Diamond & Ruby Enamel Art Deco Style White Gold Ring
By Unbranded
Located in Tysons, VA
Number: 20 Weight: 0.14 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 12 Weight: 0.40 Carat (approx. total weight) This ring will be made to you...
Diamond, Ruby, 14k Gold, White Gold, Enamel
Vintage French 18k Gold Gemstones Earrings Signed MBM
Located in Beverly Hills, CA
Colorful vintage earrings made of 18k yellow gold and set with ruby, diamond, aquamarine, turquoise, garnet, white sapphire, amethyst, tourmaline and citrine. Measurements: 1 ½” x ¾”...
Aquamarine, Citrine, Ruby, Amethyst, Turquoise, 18k Gold, Yellow Gold
Ruby Diamond Black Enamel Art Deco Style Open Work Drop Earrings in 14K Gold
Located in Bangkok, TH
(approx. total weight) Backing: Push Backs Gemstones I Type: Ruby Shape: French Cut Number: 30 Size: 1.3 – 3.5 mm.
Ruby, Diamond, Enamel, White Gold, 14k Gold
A fine and rare Georgian hair and ruby memorial ring, English, circa 1760
Located in London, GB
Georgian hair and ruby memorial ring. Set with a border of thirty two cushion shape French cut natural enhanced rubies in closed back grain settings with a combined approximate weigh...
Ruby, Yellow Gold
Peridot Ruby Gemstone Art Deco Style Milgrain Ring 9k Yellow Gold
Located in Bangkok, TH
(approx. total weight) Ring Size: Available for all sizes Center Gemstones Type: Peridot Shape: Emerald Cut Size: 10 x 8 mm. Number: 1 Weight: 3.20 Carat (approx. total weight) Ac...
Peridot, Ruby, Gold, 9k Gold, Yellow Gold
Rhombus Ruby & Diamond Art Deco Style Mosaic White Gold Ring
By Unbranded
Located in Tysons, VA
Art Deco inspired, with center rhombus shaped ruby. In additional, there are four French cut triangular shaped rubies on each side.
Diamond, Ruby, 14k Gold, White Gold
Diamond Baguette Ruby Openwork Drop Earrings in 14K White Gold
Located in Bangkok, TH
Number: 2 Weight: 0.14 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 0.50 Carat (approx. total weight) Accent Gemstones Type: Diamo...
Diamond, Ruby, 14k Gold, White Gold
Pink Tourmaline Ruby Diamond Marquise Cocktail Ring in 14K White Gold
Located in Bangkok, TH
Number: 20 Weight: 0.18 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 14 Weight: 0.64 Carat (approx. total weight) This ring will be made to y...
Diamond, Ruby, Tourmaline, Gold, 14k Gold, White Gold
Art Deco Diamond Ruby Onyx Geometric Bracelet in 18K White Gold
Located in Bangkok, TH
Number: 4 Weight: 1.20 Carat (approx. in total) Accent Gemstones II Type: Ruby Shape: French Cut Number: 120 Weight: 9.00 Carat (approx. in total) Accent Gemstones III Type: Onyx S...
Diamond, Onyx, Ruby, 14k Gold, White Gold
Wonderland Bee Oval Red Ruby & Diamond 14K White Gold Pin Brooch
By Unbranded
Located in Tysons, VA
(approx. in total) Center Gemstones Type: Ruby Shape: Oval Size: 9×7 mm. Number: 1 Weight: 3 Carat (approx. in total) Additional Gemstones I Type: Ruby Shape: French Cut Size: 3 mm.
Diamond, Ruby, 14k Gold, White Gold
Ruby Engagement Ring with Diamond Halo in 14K Yellow Gold
Located in Bangkok, TH
Number: 18 Weight: 0.14 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 4 Weight: 0.24 Carat (approx. total weight) This ring is ready to delive...
Ruby, Diamond, Yellow Gold, White Gold, 14k Gold
Citrine Ruby Peridot Diamond Geometric Ring in 14K White Gold
Located in Bangkok, TH
(approx. total weight) Ring Size: Available for all sizes Center Gemstones Type: Citrine Shape: Emerald Cut Size: 6 x 4 mm. Number: 1 Weight: 0.50 Carat (approx. total weight) Acc...
Ruby, Peridot, Citrine, Diamond, White Gold, 14k Gold, Gold
Diamond Emerald Ruby Vintage Style Spider 9kt Yellow Gold Insect Brooch
By Unbranded
Located in Tysons, VA
Number: 44 Weight: 4.45 Carat (approx.) Gemstones II Type: Ruby Shape: French Cut Size: 1.7 mm. Number: 2 Weight: 0.05 Carat (approx.)
Diamond, Emerald, Ruby, 9k Gold, Yellow Gold
Ruby Diamond Antique Style Floral Stud Earrings in 14K Whtie Gold
Located in Bangkok, TH
(approx. total weight) Backing: Push Back Center Gemstones Type: Ruby Shape: Round Size: 3.8 mm. Number: 2 Weight: 0.6 Carat (approx. total weight) Accent Gemstones I Type: Ruby Sh...
Diamond, Ruby, Gold, 14k Gold, White Gold
Ruby Diamond Art Deco Style Dinner Ring in 18K White Gold
Located in Bangkok, TH
Number: 30 Weight: 0.22 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 32 Weight: 2.05 Carat (approx. total weight) This ring will be made to y...
Diamond, Ruby, White Gold, 18k Gold
Blue Topaz & Ruby Diamond Art Deco Style White Gold Pendant
By Unbranded
Located in Tysons, VA
Number: 1 Weight: 0.75 Carat (approx. in total) Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 0.15 Carat (approx. in total) Accent Gemstones Type: Diamond Shape: ...
Aquamarine, Diamond, Ruby, Blue Topaz, 14k Gold, White Gold
Ruby & Diamond Art Deco Style Lever Back 18K White Gold Earrings
By Unbranded
Located in Tysons, VA
(approx. total weight) Backing: Lever Back Center Gemstones Type: Ruby Shape: Oval Size: 5 x 3 mm. Number: 2 Weight: 1.20 Carat (approx. total weight) Additional Gemstones I Type: Ru...
Diamond, Ruby, Gold, 18k Gold, White Gold
Oval Shape Pink Tourmaline & Ruby Diamond Vintage Inspired Rose Gold Earrings
By Unbranded
Located in Tysons, VA
Number: 2 Weight: 10.48 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Size: 4 x 3, 2 mm. Number: 8 Weight: 1.06 Carat (approx. total weight) Accent Gems...
Diamond, Ruby, 14k Gold, Rose Gold
Art Deco Style Morganite Diamond Ruby Ring in 14K Rose Gold
Located in Bangkok, TH
Number: 32 Weight: 0.20 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 2 Weight: 0.30 Carat (approx. total weight) This ring will be made to yo...
Diamond, Ruby, Morganite, Gold, 14k Gold, Rose Gold
Diamond Ruby Art Deco Style Octagonal Stud Earrings in 14K White Gold
Located in Bangkok, TH
Number: 2 Weight: 0.30 Carat (approx. in total) Accent Gemstone I Type: Ruby Shape: French Cut Size: 2 mm. Number: 24 Weight: 1.44 Carat (approx. in total) Accent Gemstone II Type:...
Diamond, Ruby, Gold, White Gold, 14k Gold
Ruby and Diamond Art Deco Style Drop Earrings in 14K White Gold
Located in Bangkok, TH
Number: 34 Weight: 0.18 Carat (approx. total weight) Accent Gemstones II Type: Ruby Shape: French Cut Number: 16 Weight: 0.32 Carat (approx. total weight) These earrings will be mad...
Diamond, Ruby, 14k Gold, White Gold
Heavy French 18k solid gold Necklace - Cleopatra collar - 1950's - Bow brooch
Located in Antwerp, BE
For sale is this wonderful chocker necklace. This treasure is made in solid 18 karat yellow gold and hallmarked with a French head of mercury hallmark. This lovely collar is inspired...
Ruby, Gold, 18k Gold, Yellow Gold
GIA 2.03 Ct. Diamond Emerald Ruby & Sapphire Dangle 18K White Gold Earrings
By Unbranded
Located in Tysons, VA
The diamonds are accentuated by French cut emeralds, sapphires, and rubies. Make a statement with this luxurious pair of colorful dangle earrings.
Diamond, Emerald, Ruby, Sapphire, 18k Gold, White Gold
Estate Arto Deco Platinum Ruby, Sapphire & Diamond Stick Pin - VHK#989
Located in Hicksville, NY
French Cut. Diamonds are old European cut, F Color, VS Clarity.
Diamond, Sapphire, Platinum
Blue Topaz Ruby Diamond Halo Art Deco Ring in 14K White Gold
Located in Bangkok, TH
Number: 6 Weight: 0.05 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 20 Weight: 1.34 Carat (approx. total weight) This ring will be made to yo...
Diamond, Ruby, Topaz, Blue Topaz, Gold, 14k Gold, White Gold
Diamond and Ruby Art Deco Style Drop Earrings in 14K White Gold
Located in Bangkok, TH
Number: 2 Weight: 0.13 Carat (approx. in total) Accent Gemstones Type: Ruby Shape: French Cut Number: 2 Weight: 0.08 Carat (approx. total weight) Accent Gemstones II Type: Diamond...
Diamond, Ruby, 14k Gold, White Gold
Diamond & Red Pink Ruby Edwardian Style Circle Ribbon White Gold Pin Brooch
By Unbranded
Located in Tysons, VA
Accent Gemstones Type: Ruby Shape: French Cut Number: 24 Weight: 3.50 Carat (approx.)
Diamond, Ruby, 14k Gold, White Gold
Ruby and Diamond Retro Style Cocktail Ring in 14K Rose Gold
Located in Bangkok, TH
Number: 26 Weight: 0.23 Carat (approx. total weight) Gemstones II Type: Ruby Shape: French Cut Number: 22 Weight: 0.80 Carat (approx. total weight) This ring will be made to your o...
Diamond, Ruby, 14k Gold, Rose Gold
Diamond and Ruby Retro Style Engagement Ring in 14K Rose Gold
Located in Bangkok, TH
Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 0.32 Carat (approx. total weight) Accent Gemstones Type: Diamond Shape: Round Average Color: H Average Clarity: SI ...
Ruby, Diamond, 14k Gold, Rose Gold
$2,000Sale Price / item|20% Off
Diamond Ruby Art Deco Style Floral Ring in 14K White Gold
Located in Bangkok, TH
Number: 1 Weight: 0.17 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 4 Weight: 0.28 Carat (approx. total weight) Accent Gemstones Type: Diamo...
Diamond, Ruby, 18k Gold, White Gold
Ruby and Diamond Art Deco Style Engagement Ring in 14K White Gold
Located in Bangkok, TH
Number: 22 Weight: 0.22 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 0.85 Carat (approx. total weight) This ring will be made to yo...
Diamond, Ruby, White Gold, 14k Gold
Art Deco Style Pink Red Ruby & Diamond Pattern Tennis 18K White Gold Bracelet
By Unbranded
Located in Tysons, VA
The fully articulated bracelet is composed of eight oval rubies and French cut 112 rubies with 292 H-J/SI round brilliant cut diamonds.
Diamond, Ruby, 18k Gold, White Gold
$3,900Sale Price|25% Off
Diamond and Ruby Art Deco Style Target Engagement Ring in Platinum 950
Located in Bangkok, TH
Number: 1 Weight: 0.27 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 16 Weight: 0.78 Carat (approx. total weight) Accent Gemstones Type: Diam...
Diamond, Ruby, Platinum
Diamond Baguette Ruby Openwork Pendant and Earrings Set in 14K White Gold
Located in Bangkok, TH
Number: 2 Weight: 0.14 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 0.50 Carat (approx. total weight) Accent Gemstones Type: Diamo...
Diamond, Ruby, White Gold, 14k Gold
Diamond Ruby Art Deco Style Rose Floral Stud Earrings in 18K White Gold
Located in Bangkok, TH
Number: 2 Weight: 0.34 Carat (approx. in total) Accent Gemstones Type: Ruby Shape: French Cut Number: 36 Weight: 1.68 Carat (approx. total weight) These earrings will be made to yo...
Diamond, Ruby, White Gold, 18k Gold
Ruby and Diamond Art Deco Style Engagement Ring in 14K White Gold
Located in Bangkok, TH
Number: 14 Weight: 0.11 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 22 Weight: 0.80 Carat (approx. total weight) This ring will be made to y...
Diamond, Ruby, White Gold, 14k Gold
Ruby and Diamond Art Deco Style Floral Ring in 14K White Gold
Located in Bangkok, TH
Number: 28 Weight: 0.19 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 2 Weight: 0.08 Carat (approx. total weight) This ring will be made to yo...
Ruby, Diamond, 14k Gold, White Gold
Diamond and Ruby Art Deco Style Cocktail Ring in 18K Rose Gold
Located in Bangkok, TH
Accent Gemstones Type: Ruby Shape: French Cut Number: 18 Weight: 1.00 Carat (approx. total weight) Accent Gemstones Type: Diamond Shape: Round Average Color: H Average Clarity: SI...
Diamond, Ruby, 18k Gold, Rose Gold
Carved Emerald & Ruby Diamond Vintage Inspired Art Deco Style Gold Pin Brooch
By Unbranded
Located in Tysons, VA
Accent Gemstones Type: Ruby Shape: French Cut Size: 2.5 mm. Number: 9 Weight: 0.62 Carat (approx.)
Diamond, Emerald, Ruby, 18k Gold, White Gold, Enamel
Green Emerald & Red Ruby Diamond Art Deco Style 18 Yellow Gold Ring
By Unbranded
Located in Tysons, VA
Accent Gemstones Type: Ruby Shape: French Cut Number: 30 Weight: 1.70 Carat (approx. total weight) Accent Gemstones Type: Diamond Shape: Round Average Color: H Average Clarity: SI ...
Diamond, Emerald, Ruby, 18k Gold, Yellow Gold
Art-Deco Platinum & 18K Gold, rubis and old cut diamonds Target Ring
Located in MONTMORENCY, FR
An elegant Art-Deco ring marrying cool platinum with warm 18K yellow gold accents, centered by a 1.00-carat old-cut diamond. The antique diamond sits in a raised scalloped bezel fram...
Diamond, Ruby, 18k Gold, Platinum
Green Tourmaline Ruby & Diamond Art Deco Style Halo 14K Yellow Gold Ring
By Unbranded
Located in Tysons, VA
Accent Gemstones Type: Ruby Shape: French Cut Size: 2.3 mm. Number: 4 Weight: 0.30 Carat (approx. total weight) Accent Gemstones Type: Diamond Shape: Round Average Color: H Average...
Diamond, Ruby, Tourmaline, 14k Gold, Yellow Gold
Emerald & Ruby Onyx Vintage Inspired Art Deco Style 18K White Gold Ring
Located in Tysons, VA
Number: 1 Weight: 0.75 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 12 Weight: 0.32 Carat (approx. total weight) Accent Gemstones Type: Onyx S...
Diamond, Emerald, Onyx, Ruby, 18k Gold, White Gold
Diamond & Red Pink Ruby Art Deco Style Marquise Shape Dangle White Gold Earrings
By Unbranded
Located in Tysons, VA
Delicately set across the face of the earrings are three round diamonds surrounded by French cut natural ruby. The entire earring is adorned with round diamonds.
Diamond, Ruby, 14k Gold, White Gold
Japanese Scenery Ring with Diamond Ruby Emerald Sapphire Enamel 18K Gold
Located in Bangkok, TH
(approx. total weight) Ring Size: Available for all sizes Gemstones I Type: Emerald Shape: French Cut Number: 6 Weight: 0.20 Carat (approx. total weight) Gemstones II Type: Ruby Sh...
Diamond, Emerald, Ruby, Sapphire, Blue Sapphire, 18k Gold, White Gold, E...
Diamond & Red Pink Ruby Art Deco Style Marquise Shape Dangle White Gold Pendant
By Unbranded
Located in Tysons, VA
Delicately set across the face of the pendant are three round diamonds surrounded by French cut natural ruby. The entire pendant is adorned with round diamonds.
Diamond, Ruby, 14k Gold, White Gold
Asscher Green Peridot & Pink Ruby and Diamond Halo Art Deco Style Gold Pendant
By Unbranded
Located in Tysons, VA
Emerald cut apple green color peridot, French cut sweet pink color tone of ruby, and round cut diamond are precisely arranged to create intricate patterns and a remarkable overall ap...
Diamond, Peridot, Ruby, 14k Gold, Yellow Gold
Round Ruby Diamond Art Deco Style Halo Set 14K White Gold Ring
By Unbranded
Located in Tysons, VA
Number: 1 Weight: 0.60 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Number: 8 Weight: 1.60 Carat (approx. total weight) Accent Gemstones Type: Diamond...
Diamond, Opal, Ruby, 14k Gold, White Gold
Mellerio Paris, a French Gold, Diamonds, Silver, and Smoky Quartz Carved Horse
By Mellerio dits Meller
Located in Long Island City, NY
Sitting on black obsidian base, the solid rock-crystal slab is finely applied with a carved smoky -quartz and jade horse with a harness mounted in 18k gold, brilliant -cut diamonds, ...
Amethyst, Diamond, Jade, Quartz, Rock Crystal, Ruby, Turquoise, Gold, Si...
Oval Shape Pink Tourmaline & Ruby Diamond Vintage Inspired Style White Gold Ring
By Unbranded
Located in Tysons, VA
Number: 1 Weight: 1.55 Carat (approx. total weight) Accent Gemstones Type: Ruby Shape: French Cut Size: 1.8 mm. Number: 12 Weight: 0.66 Carat (approx. total weight) Accent Gemstones...
Diamond, Ruby, Tourmaline, 14k Gold, White Gold
Art Deco Style Pink Red Ruby & Diamond 18K White Gold Dome Bombe Ring
By Unbranded
Located in Tysons, VA
Accent Gemstones I Type: Ruby Shape: French Cut Number: 8 Weight: 0.50 Carat (approx. total weight) Shoulder Gemstones Type: Diamond Shape: Round Brilliant Cut Average Color: H-J Ave...
Diamond, Ruby, 18k Gold, White Gold
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.