GIA Certified 11.07 Carat No Heat Burmese Ruby and Diamond Bracelet in Platinum
Located in Southport, CT
An incredible specimen of non heated Burmese Rubies at their finest exhibiting the maximum scale of color intensity and saturation possible. These rubies exhibit the hallmark of flo...
Diamond, Ruby, Platinum
GRS Certified 1.91 Carat Pigeon Blood Burmese No Heat Ruby and Diamond Earring
By Rewa Jewellery
Located in Bangkok, TH
At the heart of these earrings lies a captivating pair of rubies, totaling 1.91 carats. Certified by Gem Research Swisslab (GRS) as 'Pigeon Blood' Red in color and of Burmese origin,...
Diamond, Ruby, Gold, 18k Gold
7.03 Carat Burmese Ruby No Heat And Diamond Earrings In 18Karat White Gold
By Rewa Jewellery
Located in Bangkok, TH
It has 2 centre pieces of Burma No Heat Rubies weighing 2.48 carat approximately and 6 pieces of rubies weighing approximately 4.55 carats.
Diamond, Ruby, 18k Gold, White Gold
GRS Certified 2.20 Carat Burmese Pigeon Blood No Heat Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
A brand new pair of ruby and diamond earrings from Rewa. The centre stones are natural rubies from Myanmar, Burma, and are certified as No Heat 'Pigeon Blood' from GemResearch Swissl...
Diamond, Ruby, Gold, 18k Gold, White Gold
Gubelin Certified 1.13 Carat Burma No Heat Ruby White Diamond 18K Gold Ring
Located in Kowloon, Hong Kong
A beautiful creation, it features a rare 1.13 carat Burmese natural ruby, spared of any treatment whatsoever, surrounded by high quality natural white mixed cut diamonds. Certified ...
White Diamond, Ruby, 18k Gold
Gubelin Certified 0.89 Carat Burma No Heat Ruby White Diamond 18K Gold Ring
Located in Kowloon, Hong Kong
A beautiful creation, it features a rare 0.89 carat Burmese natural ruby, spared of any treatment whatsoever, surrounded by high quality natural white mixed cut diamonds. Certified ...
White Diamond, Ruby, 18k Gold
Gubelin Certified 0.93 Carat Burma No Heat Ruby White Diamond 18K Gold Ring
Located in Kowloon, Hong Kong
A beautiful creation, it features a rare 0.93 carat Burmese natural ruby, spared of any treatment whatsoever, surrounded by high quality natural white mixed cut diamonds. Certified ...
White Diamond, Ruby, 18k Gold
GRS Certified 1.47 Carat Pigeon Blood Burmese No Heat Ruby and Diamond Earring
By Rewa Jewellery
Located in Bangkok, TH
Inspired by classic design elements, these earrings showcase a stunning pair of rubies at the center, totaling 1.47 carats. Certified by Gem Research Swisslab (GRS), the rubies exhib...
Diamond, Ruby, Gold, 18k Gold
GRS Certified 2.02 Carat Pigeon Blood Burmese No Heat Ruby and Diamond Earring
By Rewa Jewellery
Located in Bangkok, TH
Inspired by classic design elements, these earrings feature a captivating pair of rubies at the center, totaling 2.02 carats. Certified by Gem Research Swisslab (GRS), these rubies s...
Diamond, Ruby, Gold, 18k Gold
GRS Certified 2.23 Carat Pigeon Blood Burmese No Heat Ruby and Diamond Earring
By Rewa Jewellery
Located in Bangkok, TH
Inspired by classic design elements, these earrings feature a captivating pair of rubies at the center, totaling 2.23 carats. Certified by Gem Research Swisslab (GRS), these rubies d...
Diamond, Ruby, Gold, 18k Gold
Natural No Heat Burma Ruby 1.14ct Ring with Diamonds in 14K White Gold
Located in Berlin, BE
Elegant ring crafted in 14K white gold, set with a natural unheated ruby from Burma (Myanmar) weighing 1.14 carats. The ruby displays a vivid and attractive red color with strong pre...
Diamond, Ruby, 14k Gold, White Gold
1.35 Carat Octagon-Cut Burma No Heat Ruby and White Diamond Pendant Necklace
Located in Hong Kong, HK
A beautiful pendant necklace, it features a 1.35 carat emerald-cut unheated Burmese ruby in the centre surrounded by a halo of white round-brilliant cut diamonds weighing 0.12 carat....
White Diamond, Ruby
GIA Certified 6.21 Carat No Heat Burma Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
The rubies are pigeon blood in colour. The rubies in these pair of earrings have been certified by the Gemological Institute of America (GIA), as Burmese no heat.
Diamond, Ruby, 18k Gold, White Gold
7.70 Carat Burma No Heat Spinel Cabochon Ruby White Diamond 18K Gold Earrings
Located in Kowloon, Hong Kong
Presenting a pair of exceptional 7.7 carat Burma no heat spinel cabochon, ruby, and diamond earrings, masterfully crafted in 18k white gold.
White Diamond, Ruby, Spinel, 18k Gold, White Gold
Ruby and Diamond Ring GIA Certified 1.34 Carat Burma No Heat in Platinum
Located in Bangkok, TH
The center stone is a 1.34-carat Burmese ruby, certified by Gemological Institute of America (GIA) with a 'Purple Red' rating for its red and purple undertone color and no heat treat...
Diamond, Ruby, Platinum
8.73 Carat No Heat Burma Ruby and Diamond Earrings in 18Karat White Gold
By Rewa Jewellery
Located in Bangkok, TH
The centre stones are two Burmese rubies without any heat treatment, weighing approximately 2.39 carat total and 12 rounds shaped rubies weighing approximately 6.34 carat total.
Diamond, Ruby, 18k Gold, White Gold
GRS Certified 0.88 Carat Pigeon Blood Burma No Heat Ruby and Diamond Ring
By Rewa Jewellery
Located in Bangkok, TH
A ‘Pigeon Blood’ red ruby and diamond solitare ring made in 18 Karat gold made by Rewa The ring ships from the US, there are no tariffs or import tax to buyers in the US.. This rin...
Diamond, Ruby, Gold, 18k Gold
GRS Certified 2.27 Carat Burma No Heat Pigeon Blood Ruby And Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
An elegant pair of Burma ruby and diamond earrings from Rewa Jewels is handcrafted in 18 karat white gold. The centre piece is of natural untreated cushion cut Burmese rubies weig...
Diamond, Ruby, 18k Gold, White Gold
GIA Certified Pigeon Blood 10.43 Carat Burma No Heat Ruby And Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
The main highlights are the 10 pieces untreated Burmese rubies weighing approximately 10.43 carat in all.
Diamond, Ruby, 18k Gold, White Gold
GRS Certified 2.03 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
The centre ruby has been set with four claw prongs. The center stone is supported by an additional 2 Burmese no heat rubies weighing approximately 0.86 carat.
Diamond, Ruby, Gold, 18k Gold
$13,600Sale Price|20% Off
3.20 Ct GIA Certificate Unheated Burma Ruby Red color eye clean quality No heat
Located in bangkok, TH
RMA111 3.20 Ct GIA Certificate Natural ruby Burma unheated Red color eye clean quality Gemstone GEM DESCRIPTION Species : Natural Corumdum Variety: Natural Ruby Unheated Weight: 3.20...
Ruby
AGL Certified 2.52 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center rubies cushion cut 2.02 carat weight and round rubies 0.50 carat weight - Every ruby has been tested and certified by AGL (Thai) as natural rubies from Burm...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 3.17 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are Pigeon Blood rubies 19.23carat weight - Every ruby has been tested and certified by AGL (Thai) as natural rubies from Burma, without any heat treatment. - The rubies h...
Diamond, Ruby, Gold, 18k Gold, White Gold
$4,640Sale Price|20% Off
1.25 Ct AIGS Certified Unheated Burma Ruby Pigeon Blood color eye clean No heat
Located in bangkok, TH
RMA97 1.25 Ct AIGS Certified Natural Burma Ruby Unheated Pigeon Blood color eye clean quality Gemstone GEM DESCRIPTION Species: Natural Corumdum Variety: Natural Ruby Unheated Weigh...
Ruby
GRS Certified 2.12 Carat Pigeon Blood Burmese No Heat Ruby Diamond Pendant 18K
By Rewa Jewellery
Located in Bangkok, TH
A brand new ruby and diamond pendant by Rewa Jewels. The centre ruby is a 2.12 carat ruby certified by Gem Research Swisslab (GRS) as Burmese, No Heat, and of 'Pigeon Blood' status.
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 1.69 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are Pigeon Blood rubies, with the total weight of 1.69 carat, total 8 pieces. - Every ruby has been tested and certified by AGL (Thai) as natural rubies from Burma, withou...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 2.22 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two oval shaped Pigeon Blood rubies, with the total weight of 2.22 carat. - The rubies have been tested and certified by AGL (Thai) as natural rubies from Burma, withou...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 4.92 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- The two largest round rubies have a total total weight of 2.01 carats, and four smaller rubies have a total weight of 2.91 carats. - Every ruby has been tested and certified by A...
Diamond, Ruby, Gold, 18k Gold, White Gold
GRS Certified 1.08 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Ring
Located in Bangkok, TH
A brand new ruby and diamond ring. The ruby weighs 1.08 carat and is certified by Gem Research Swisslab (GRS) as natural, no heat, and 'Pigeon Blood'. The total diamond weight is 0.4...
Diamond, Ruby, 18k Gold, White Gold
AGL Certified 14.90 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are 12 pieces of rubies total weight 4.79carat -There are oval shaped blue sapphires 18 pcs of total 10.11 carat weight - Every ruby has been tested and certified by AGL ...
Diamond, Ruby, Gold, 18k Gold, White Gold
GRS Certified 1.54 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 1.57 carat, and individual weights of 0.73 and 0.81 carat. - Every ruby has been tested and certified by G...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 2.97 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 2.10 carat, and two smaller rubies with a total weight of 0.87 carat. - Every ruby has been tested and cer...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 3.17 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 2.34 carat, and two smaller rubies with a total weight of 0.83 carat. - Every ruby has been tested and cer...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 3.17 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 2.34 carat, and two smaller rubies with a total weight of 0.83 carat. - Every ruby has been tested and cer...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGL Certified 2.58 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 2.03 carat, and two smaller rubies with a total weight of 0.55 carat - Every ruby has been tested and cert...
Diamond, Ruby, Gold, 18k Gold, White Gold
AGLThai Certified 4.13 Ct Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
- There are two center oval Pigeon Blood rubies, with the total weight of 0.82 carat, and two smaller rubies with a total weight of 3.31 carat. - The center rubies has been tested ...
Diamond, Ruby, Gold, 18k Gold, White Gold
Vintage 14k Gold 5.25ctw GIA Burma No Heat Ruby Emerald Eye Jumping Fish Brooch
Located in Montclair, NJ
-- Stone(s) -- Numerous Natural Genuine Rubies - Older Round Cut - Beautifully Hand Pave Set - Purplish Red - Burma - No Heat - 5.25ctw (approx.) ** See Certification Details Below f...
Emerald, Ruby, Gold, 14k Gold, Yellow Gold
GIA Certified 5.32 Carat Burma No Heat Vivid Red Ruby Diamond Gold Earrings
Located in Kowloon, Hong Kong
5.32 ct Burma No Heat Ruby & Diamond Chandelier Earrings (GIA Certified) Indulge in commanding elegance with these breathtaking chandelier earrings, showcasing 5.32 carats of GIA-ce...
Diamond, White Diamond, Ruby, Gold, 18k Gold, White Gold
12 Carat Certified Natural Burma No Heat Ruby Diamond Platinum Three-Stone Ring
Located in New York, NY
A beautiful no heat, natural oval shape ruby cabochon weighing over twelve carats, accented with two tapered trapezoid shape step-cut diamonds, set in Platinum.
Diamond, Ruby, Platinum
8.53 Carat Burma Ruby No Heat and Diamond Earrings in 18Karat White Gold
By Rewa Jewellery
Located in Bangkok, TH
There are 50 Burmese rubies without any heat treatment, weighing approximately 8.53 carat total.
Diamond, Ruby, 18k Gold, White Gold
GRS Certified 3.00 Carat Burmese No Heat Pigeon Blood Ruby and Diamond Earrings
By Rewa Jewellery
Located in Bangkok, TH
The center stones are 1.50 and 1.50-carat Burmese ruby, certified by Gem Research Swisslab (GRS) with a 'Pigeon Blood' rating for its vivid-red color and no heat treatment.
Diamond, Ruby, 18k Gold, Gold, White Gold
Certified Vintage Style No Heat Burma Ruby and White Diamond Cluster Ring
Located in London, GB
Perfect as a gift for someone with passion and style, this eye-catching ring features a stunning oval ruby in bright pinkish-red at its centre. Around it, a cluster of small white di...
White Diamond, Ruby, Yellow Gold, 9k Gold
GRS Certified 1.07 Carat Burmese Ruby No Heat Pigeon Blood Enamel Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.07 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
GIA Certified 0.66 Carat Ruby Burmese No Heat Pigeon Blood and Diamond Ring
By Rewa Jewellery
Located in Bangkok, TH
A brand new ring by REWA Jewelry which reimagines the timeless Toi et Moi style with a captivating pairing of a heart-shaped diamond and a rich ruby. The centre of the ring is a hea...
Diamond, Ruby, Gold, 18k Gold, White Gold
GRS Certified 1.29 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.29 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
GIA Certified 0.78 Carat Ruby Burmese No Heat Pigeon Blood and Diamond Ring
By Rewa Jewellery
Located in Bangkok, TH
A brand new ring by REWA Jewelry which reimagines the timeless Toi et Moi style with a captivating pairing of a heart-shaped diamond and a rich ruby. The centre of the ring is a hea...
Diamond, Ruby, Gold, 18k Gold, White Gold
GRS Certified 1.30 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.30 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
GRS Certified 1.13 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.13 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
Ruby and Diamond Ring GRS Certified 5.09 Carat Burma No Heat in 18K
By Rewa Jewellery
Located in Bangkok, TH
The center stone is a 5.09-carat Burmese ruby, certified by Gem Research Swisslab (GRS) with a 'Purplish-Red' rating for its red and purple undertone in color and no heat treatment.
Diamond, Ruby, Gold, 18k Gold, White Gold
GRS Certified 1.38 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.38 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
GRS Certified 1.35 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 1.35 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
Antique Art Deco Platinum GIA Burma No Heat Square Ruby Stack Eternity Band Ring
Located in Montclair, NJ
--Stone(s):-- Numerous Natural Genuine Rubies - Square Step Cut - Channel Set - No Heat - Burma - Rich Vivid Red Color - 1.10ctw (approx.)
Ruby, Platinum
GIA Certifed Pigeon Blood 6.13 Carat Burma No Heat Ruby and Diamond Brooch
By Rewa Jewellery
Located in Bangkok, TH
A brand new ruby and diamond brooch made by Rewa Jewels crafted in 18 karat white gold. This extraordinary brooch has 6 pieces of untreated Burmese rubies weighing approximately 6.1...
Diamond, Ruby, 18k Gold, White Gold
GIA Certified 17 Carat Burma No Heat Vivid Red Ruby White Diamond Hoop Earrings
Located in Kowloon, Hong Kong
GIA Certified 17 Carat Burma No Heat Vivid Red Ruby White Diamond Hoop Earrings Indulge in commanding elegance with these breathtaking hoop earrings, showcasing 17 carats of GIA-cer...
Diamond, White Diamond, Ruby, Platinum
8.94 ctw Vintage Style No-Heat Burmese Ruby & Diamond Halo Ring 18K Yellow Gold
Located in Tysons, VA
Details: Style: Vintage Style Center Stone: Burmese Ruby (Oval Cut, No-Heat) Center Stone Weight: 8.13 ct Accent Stones: Diamonds (Round Brilliant-Cut) Estimated Diamond Weight: 0.81...
Diamond, Ruby, 18k Gold, Yellow Gold
Ruby and Diamond Ring GRS Certified 2.51 Carat Burma No Heat in 18K
By Rewa Jewellery
Located in Bangkok, TH
The center stone is a 2.51-carat Burmese ruby, certified by Gemological Institute of America (GIA) with a 'Red' rating for its saturated red color and no heat treatment.
Diamond, Ruby, Gold, 18k Gold, White Gold
12.28 ctw Mid-Century Style No-Heat Burmese Ruby & Diamond Ring 18K Yellow Gold
By Unbranded
Located in Tysons, VA
Details: Style: Mid-Century Style Center Stone: Burmese Ruby (Cabochon Cut, No-Heat) Accent Stones: Diamonds Total Carat Weight: 12.28 ctw Metal: 18K Yellow Gold Ring Size: 7 (Not si...
Diamond, Ruby, 18k Gold, Yellow Gold
GRS Certified 0.92 Carat Burmese Ruby Diamond No Heat Pigeon Blood Ring in Gold
By Rewa Jewellery
Located in Bangkok, TH
A brand new handcrafted ruby ring by Rewa Jewels. The ring's center stone is 0.92 carat Burmese ruby certified by Gem Research Swisslab (GRS) as natural, unheated, 'Pigeon blood' wit...
Diamond, Ruby, Gold, 18k Gold
Emilio Jewelry GRS Certified 7.50 Carat Burma No Heat Pigeon Blood Ruby Ring
By Emilio!
Located in New York, NY
From Emilio Jewelry, a well known and respected wholesaler/dealer located on New York’s iconic Fifth Avenue, Please inquire for more images, certificates, and details. Zoom meetings...
Ruby
$115,745Sale Price|20% Off
18 Kt Gold No Heat 6.15 Ct Burmese Ruby Cabochon & Intense Fancy Diamonds Ring
Located in Antwerp, BE
Magnificant 18 Kt. Gold No Heat Burmese Ruby Cabochon & Intense Fancy Diamonds Ring Ruby: Red, Cabochon cut, natural corundum, No heat Burmese Ruby 6.15 ct , Looks like Pigeon Blood !
Diamond, Ruby, 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.
