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Five Ruby and Sapphire Gemstones: 5.36 carat loose blue (dark grey blue) oval cabochon, heated, Madagascar. 1.97 carat cushion shaped red ruby, heated, Songea, Africa (Tanzania). 0.98 carat cushion shaped cornflower blue sapphire, hea

Apr 09, 2026

Five Ruby and Sapphire Gemstones

Cordier Auctions

Est. $200-$300

Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring: Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring This exquisite antique Art Deco engagement ring showcases a stunning 1.01 carat GIA certified old European cut diamond, set in solid

17 hrs Left

Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring

Est. $5,200-$6,760

Three Natural Ruby Gemstones with Lab Reports: 2.42 carat loose rectangular cushion shaped orangy red natural corundum (ruby), determined to have no indications of heating. 1.56 carat loose cushion shaped purplish red natural corundum (ruby), dete

Apr 09, 2026

Three Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

Three Natural Ruby Gemstones with Lab Reports: 2.71 carat loose cushion shaped purplish red natural ruby, determined to have no evidence of heat enhancement. 1.53 carat loose cushion shaped purplish red ruby, determined to have no evidence of heat

Apr 09, 2026

Three Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

Natural Ruby Gemstone with Lab Report: 4.19 carat loose pear shaped purplish red, Mozambique, determined to have no indication of thermal treatment. The lab report is from GRS GemResearch Swisslab Switzerland, considered one of the most re

Apr 09, 2026

Natural Ruby Gemstone with Lab Report

Cordier Auctions

Est. $400-$800

Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring: Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring This exquisite antique Art Deco engagement ring showcases a stunning 1.01 carat GIA certified old European cut diamond, set in solid

7 days Left

Antique Art Deco 14k White Gold 1.01ct GIA Diamond Engagement Ring

Est. $8,520-$10,309

Three Natural Ruby Gemstones with Lab Reports: 2.11 carat loose cushion shaped purplish red natural ruby, determined to have no evidence of heat enhancement. 1.02 carat loose pear shaped purplish red ruby, determined to have no evidence of heat en

Apr 09, 2026

Three Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

Natural Ruby Gemstone with Lab Report: 1.23 carat loose cushion shaped purplish red natural ruby, determined to have no evidence of heat treatment, Burapha Gemological Laboratory, Chanthaburi. From a selection of fine gemstones of a retiri

Apr 09, 2026

Natural Ruby Gemstone with Lab Report

Cordier Auctions

Est. $100-$200

Victorian Yellow Gold Bangle Bracelet with Ruby Diamond Turquoise: Victorian Yellow Gold Bangle Bracelet with Ruby Diamond Turquoise This exquisite Victorian-style bangle bracelet is crafted from yellow gold and features a stunning arrangement of round-cut diamonds,

4 days Left

Victorian Yellow Gold Bangle Bracelet with Ruby Diamond Turquoise

Est. $13,754-$17,880

One Natural Ruby Gemstone with Lab Report: 3.54 carat loose cushion shaped red natural ruby, determined to have no positive microscopic evidence of heat enhancement, Emil Gem Laboratory (Japan), Bangkok. From a selection of fine gemstones of a

Apr 09, 2026

One Natural Ruby Gemstone with Lab Report

Cordier Auctions

Est. $100-$200

Three Natural Ruby Gemstones with Lab Reports: 1.69 carat loose oval brilliant step cut orangy red natural corundum (ruby), determined to have no indications of heating, GIT The Gem and Jewelry Institute of Thailand. 2.44 carat oval natural red ru

Apr 09, 2026

Three Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

3 Gemstones incl Ruby and Sapphire: Includes (1) Pink Sapphire, square, 3.66 carats, no evidence of heat enhancement; (2) Ruby, oval, 1.92 carats, natural; and (3) Yellow Sapphire, pear, 1.93 carats, natural. From a selection of fine ge

Apr 09, 2026

3 Gemstones incl Ruby and Sapphire

Cordier Auctions

Est. $200-$400

Natural Ruby Gemstone with Lab Report: 1.81 carat loose oval shaped redish purple natural ruby, determined to have no indications of heat treatment, Burapha Gemological Laboratory, Chanthaburi. From a selection of fine gemstones of a retir

Apr 09, 2026

Natural Ruby Gemstone with Lab Report

Cordier Auctions

Est. $100-$200

Two Natural Ruby Gemstones with Lab Reports: 2.38 carat loose cushion shaped purplish red, determined to have no evidence of heat enhancement. 1.44 carat loose pear shaped pinkish red, determined to have no evidence of heat enhancement. Both lab

Apr 09, 2026

Two Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

Three Natural Ruby Gemstones with Lab Reports: 1.46 carat loose natural pink ruby, oval cut, no evidence of heat enhancement, SLP Gem Laboratory Bangkok. 2.05 carat loose OM/Fancy cut red natural ruby, no evidence of thermal treatment, Gemological

Apr 09, 2026

Three Natural Ruby Gemstones with Lab Reports

Cordier Auctions

Est. $200-$400

Four Natural Ruby Gemstones: 5.07 carat loose oval red ruby, Africa. 2.02 carat oval pinkish red, Africa. 2.32 carat red octagon, Madagascar. 0.99 carat oval red, Madagascar. The gemstone records from the gemologist collector ind

Apr 09, 2026

Four Natural Ruby Gemstones

Cordier Auctions

Est. $200-$400

Six Ruby Gemstones: One matched pair of pinkish red oval cabochon rubies, Burma. 6.4 carat oval cabochon red ruby, India. 10.15 carat pinkish red oval cabochon, Africa. 2.2 carat oval cabochon red ruby, Africa. 2.5 carat

Apr 09, 2026

Six Ruby Gemstones

Cordier Auctions

Est. $100-$200

Three Gemstones: Tanzanite, Sapphire, Ruby: 2.49 carat deep blue oval sapphire, heated, Africa. 0.64 carat pear shaped blue violet tanzanite, treatment: natural, Tanzania. 1.32 carat round red ruby, treatment: none, Madagascar. The heat treatme

Apr 09, 2026

Three Gemstones: Tanzanite, Sapphire, Ruby

Cordier Auctions

Est. $100-$200

Three Ruby Gemstones: Loose 1.75 carat top red antique facet cut ruby, with the Burapha Gemological Laboratory report stating untreated. 1.70 carats cushion/mixed cut ruby, with the Burapha Gemological Laboratory report st

Apr 09, 2026

Three Ruby Gemstones

Cordier Auctions

Est. $100-$200

Extra Fine Grade Natural African *Round* Cut VS2-SI1 Vivid Ruby Red Diamond: Extra Fine Grade Natural African *Round* Cut VS2-SI1 Vivid Ruby Red Diamond Natural Diamonds Only: 100% Earth Mined No Synthetics,

6 days Left

Extra Fine Grade Natural African *Round* Cut VS2-SI1 Vivid Ruby Red Diamond

Weatherham Estate Treasures

Est. $1,200-$1,500

Four Ruby Gemstones: 3.1 carat loose oval cabochon red ruby, Zambia. 3.4 carat oval cabochon red ruby, India. 1.05 carat oval cabochon red ruby, Africa. 1.08 carat oval cabochon, Burma. The gemologist collector's records

Apr 09, 2026

Four Ruby Gemstones

Cordier Auctions

Est. $100-$200

Ruby Gemstone with Lab Report: 1.18 carat pinkish red octagonal natural ruby with evidence of heat enhancement. The laboratory report is TGL Tokyo Gem Laboratory (Thailand) Co., Ltd. From a selection of fine gemstones of a retiring

Apr 09, 2026

Ruby Gemstone with Lab Report

Cordier Auctions

Est. $100-$200

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