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Rubies from the Niassa and Cabo Delgado Regions of Northern Mozambique
モザンビーク北部のニアッサとカボ デルガド地域産のルビー
Ruby Journey
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire
Ruby History and Lore
The name ruby comes from the Latin word ruber, which means “red.” The glowing red of ruby suggested an inextinguishable flame burning in the stone...
Ruby Care and Cleaning Guide
Learn about ruby's durability and how to care for your ruby jewelry.
Ruby Quality Factors
Ruby can command the highest prices of any colored gemstone. The per-carat prices of fine-quality rubies have been rising consistently, many times breaking auction records. Click here and learn about the factors that make ruby so desirable!
Ruby Description
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
Not All That Glitters is Gold — Sometimes it is Mozambican Rubies
採鉱の歴史、特徴、市場の需要など、モザンビーク産ルビーについて学びましょう。
Update on "Low-Temperature" Heat Treatment of Mozambican Ruby: A Focus on Inclusions and FTIR Spectroscopy
Non-Bead-Cultured Pearls from Pinctada margaritifera
A new report from GIA's Bangkok laboratory,
Non-Bead-Cultured Pearls from Pinctada margaritifera
A new report from GIA's Bangkok laboratory examines a set of 120 NBC samples stated to be of "Tahitian" origin.
30-Year Marine Corps Veteran Fulfills Dream of Becoming a Field Gemologist
The rigors and often-harrowing conditions of gemology field expeditions are no match for 30-year Marine veteran with a love of gems.
A Study of Rubies from Cambodia and Thailand
A report from the GIA Laboratory in Bangkok analyzing 41 Cambodian-Thai rubies.
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