The heat-induced conversion of limonitic residues to hematite in surface-reaching inclusions provides another useful clue to heat treatment in corundum. Because this alteration happens at such a low ...

This large Australian light opal cabochon weighs 117.85 carats. Small play-of-color flashes of orange and green predominate in a pinfire pattern, with spots of a more muted blue over a grayish ...

Akoya pearls are the small white pearls that most people picture when they think of pearls. They are saltwater pearls, and are usually round and white or cream, with a pink overtone and high luster.

Quartz crystals were valued by the ancient Egyptians as talismans with powers to prevent aging. - Bob Kammerling Rose quartz beads dating back to 7000 BC have been found in the area once known as ...

This faceted rose quartz briolette weighs 18.29 carats. Its pastel color is a lovely example of the soft pink this gem is known for. - Robert Weldon, courtesy The Greenwood Group The soft translucence ...

Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007. Gemological and Trace Element Characteristics of Cassiterite from Yunling, China Examines gem-quality ...

Those born in January are lucky to have the beautiful and diverse garnet as their birthstone. Garnets are commonly red but also come in an extraordinary range of beautiful colors, including orange, ...

Large quantities of rubies—both rough and faceted—from a commercially important new source in Myanmar (Burma) have been available on the Bangkok market since 1992. The ruby crystals from the Mong Hsu ...

If you like gemstones with provenance, then you’re going to love ammolite - iridescent fossilized ammonite shells found in Southern Alberta, Canada. When the earth had only one continent with no ...

由来のある宝石がお好きなら、アンモライトがお気に入りの宝石になるでしょう。アンモライトとは、カナダのアルバータ州南部で発見されたイリデッセンスを示す化石化したアンモナイト ...

如果您喜欢产地明确的宝石，那么您一定会喜欢菊石，这种产自加拿大阿尔伯塔省南部的宝石，是带有虹彩的石化菊石壳体。 在地球还是一整块大陆、没有森林或哺乳动物的时候，菊石群就已经 ...

The Graduate Jeweler diploma program is a hands-on experience that introduces students to the knowledge and skills required for a career in jewelry fabrication and repair. You will work with gemstones ...