Two new deposits of Cu-bearing tourmaline have been found in Paraíba State, Brazil, not far from the original source at Mina da Batalha. The Glorious mine has produced a limited amount of gem-quality ...

The unique beauty of gem sapphires from Kashmir has brought fame to a locality about which little has been reported in recent years. After an initial burst of activity 100 years ago, the production of ...

Figure 1. This 239.25 ct topaz crystal hosts some interesting inclusions of ferrocolumbite. Photo by Diego Sanchez. The author recently acquired a 239.25 ct transparent well-formed topaz crystal from ...

Natural-color saltwater cultured pearls from Pinctada margaritifera were studied by diffuse reflectance UV-Vis-NIR spectroscopy to identify the absorption features associated with their various colors ...

搜索城市或邮政编码，查找出售 GIA 分级钻石或有经过 GIA 培训的员工的零售商。搜索结果包括地址、营业时间和路线。 “查找零售商”列表上显示的营业时间可能不准确。建议联系各家商店 ...

GIAでグレードされたダイヤモンドのを取り扱う、またはGIAにより訓練を受けたスタッフのいる小売業者を、都市名またはや郵便番号で検索します。検索結果には住所と営業時間、そして ...

営業時間: 営業時間: 月～金曜日：午前9時 ～午後4時。 石のお預かりに関して、窓口での受付・返却はすべてGIAセントラル(中環)サービスセンターで行います。郵送の場合は、九龍湾/カオ ...

CARLSBAD, California – September 23, 2024 – Everything retailers and their customers need to know about diamonds just got easier to find and understand with GIA’s redesigned consumer-facing website ...

GIA has studied more than 400 important gemstones in the Edward J. Gübelin Gem Collection and is committed to sharing this repository of gemological information. Dr. Edward Gübelin’s lifelong study of ...

摄影：Robert Weldon（罗伯特·韦尔登）/GIA，E. J. Gübelin（E.·J.·古柏林）博士藏品友情提供 GIA 藏品 34365 Edward Gübelin（爱德华·J.古柏林）博士收集的藏品中，有许多来自世界各地的罕见宝石。

Edward Gübelin博士によって集められたコレクションの中には、世界中の産地からの珍しい宝石が多数あります。以下のような文書は、時折ジュエリーで使用されるものから、かなり希少なもの ...

However gem quality diamonds are fashioned from the original crystal shape they possess a combination of brightness, sparkle, fire, and sense of purity not matched by other gems. - Jeff Scovil, ...