The more than 15 kilograms of gem rough included more than 10,000 carats ... The GIA field gemology team has visited all the main ruby, sapphire, emerald and spinel-producing areas in Asia and ...

Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, ...

GIA’s laboratories use advanced instrumentation and research to deliver accurate grading, identification, and origin ...

However, note that your sapphire, ruby, emerald, pearls or semiprecious ... can be sold on a site like Etsy or ebay. Raw or rough gemstones like rubies or sapphires, if they are of significant ...

The music star wore a vintage gown from the same spring 2000 collection from which Jennifer Lopez's iconic Grammys dress ...

The GIA team collected tsavorite, spinel and sapphire rough, verifying and recording the precise origin of each sample ...

Dragontrail Glass, sapphire, Ceramic Shield ... Corning says the new solution can better withstand drops on “rough, challenging surfaces.” It also said the glass was able to withstand drops ...

Some facet-grade ruby has been recovered, but most of the material consists of semitransparent pink sapphire of cabochon or carving quality. The most common internal features are dense concentrations ...

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