Ruby Gemstone | Ruby Stone – GIA

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Ruby

Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.

Ruby

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01.snakemaster-front-and-back-153957_1280x720.jpg. この頭蓋骨はタンザニア産ルビーと金バーメイル、黒曜石から作られていますが、ルビーのような硬質の素材は研磨に時間がかかり手順が8つも追加されるので、作成には3倍の時間を要しています。 — この頭蓋骨はタンザニア産ルビーと金バーメイル、黒曜石から作られていますが、ルビーのような硬質の素材は研磨に時間がかかり手順が8つも追加されるので、作成には3倍の時間を要しています。

フラクチャー充填処理されたルビー. これらのようにルビーの表面に達するフラクチャーは、フラクチャーの外観を軽減するために溶融鉛ガラスで充填されることがある。 — これらのようにルビーの表面に達するフラクチャーは、フラクチャーの外観を軽減するために溶融鉛ガラスで充填されることがある。

合成ルビー. 合成ルビーは、フラックス成長法（左、結晶とカット石）、および火炎溶融法（右、ブールと呼ばれる西洋梨のような合成原石とカット石）により作ることができる。 — 合成ルビーは、フラックス成長法（左、結晶とカット石）、および火炎溶融法（右、ブールと呼ばれる西洋梨のような合成原石とカット石）により作ることができる。

主にフラックス内包物. フラックス法によるカーシャーン産合成ルビーに顕著なインクルージョンは、半透明から不透明の一次フラックス。写真：Nathan Renfro/GIA — フラックス法によるカーシャーン産合成ルビーに顕著なインクルージョンは、半透明から不透明の一次フラックス。写真：Nathan Renfro/GIA

Rubies from Myanmar. These rubies were all mined in Myanmar (formerly known as Burma). The faceted stone weighs 11.55 carats and the rough stones weigh between 16.65 carats and 278.50 carats. Photo: Robert E. Kane/GIA. — These rubies were all mined in Myanmar (formerly known as Burma). The faceted stone weighs 11.55 carats and the rough stones weigh between 16.65 carats and 278.50 carats. Photo: Robert E. Kane/GIA.

Various Cuts of Rubies. Rubies are commonly cut into oval and cushion shapes. – Photo: Robert Weldon/GIA. Rough: Gift of William F. Larson. Cut stone: Courtesy: Edward Boehm. — Rubies are commonly cut into oval and cushion shapes. – Photo: Robert Weldon/GIA. Rough: Gift of William F. Larson. Cut stone: Courtesy: Edward Boehm.

Silk. Intersecting needles of the mineral rutile create a common ruby inclusion called silk. When they are intact, they prove the ruby was not heat-treated at very high temperatures. It’s still possible that lower-temperature heat treatment might have occurred. Photo: John I. Koivula, GIA. — Intersecting needles of the mineral rutile create a common ruby inclusion called silk. When they are intact, they prove the ruby was not heat-treated at very high temperatures. It’s still possible that lower-temperature heat treatment might have occurred. Photo: John I. Koivula, GIA.

11.01-carat Ruby. Fine-color, large, and eye-clean (lacking visible inclusions) rubies like this 11.01carat (ct) stone from Myanmar (formerly known as Burma) are extremely rare and valuable. – Photo: Robert Weldon/GIA. Courtesy: Jan Goodman Co — Fine-color, large, and eye-clean (lacking visible inclusions) rubies like this 11.01carat (ct) stone from Myanmar (formerly known as Burma) are extremely rare and valuable. – Photo: Robert Weldon/GIA. Courtesy: Jan Goodman Co

Ruby Slippers. To commemorate the 50th anniversary of The Wizard of Oz, Harry Winston created real ruby slippers set with 4,600 rubies. - Courtesy Harry Winston — To commemorate the 50th anniversary of The Wizard of Oz, Harry Winston created real ruby slippers set with 4,600 rubies. - Courtesy Harry Winston

Rubies in Marble Deposits. Rubies found in marble deposits often have a vibrant red glow. — Rubies found in marble deposits often have a vibrant red glow.

Heart Shaped Ruby Ring. Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. — Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co.

A large, silky ruby crystal from the Montepuez area of Mozambique, seen in Nampula in September 2009. Photo by Vincent Pardieu/GIA.

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