ギリシャのラウリウムにある古代の銀山に関して編集された注釈付きの書籍リスト

Webinars are an easy, informal way for GIA experts to share information and stay connected to the community of researchers and gem and jewelry lovers.

この書籍リストは、ブラジル産のダイヤモンドおよびカーボナードの歴史について学ぶ機会を提供するために編集されました。

この書籍リストは、ブラジル産のダイヤモンドおよびカーボナードの歴史について学ぶ機会を提供するために編集されました。

宝石学フォトジャーナリストのRobert Weldonが、お気に入りの写真に秘められた逸話を紹介します。

A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.

A rare Burmese star peridot cabochon is characterized by a soft four-rayed asterism and extremely fine acicular inclusions.

Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.

Green nephrite deposits are found at many locations around the globe, with British Columbia, Siberia, and northwestern China as the leading producers.

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

Untreated Russian emeralds, rarely seen in the market, demonstrate a range of color and degree of fineness.

Inclusions resembling snowflakes, and hues of many colors, are two characteristics seen in fine-quality jadeite specimens on offer at the Tucson gem show.