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Flashes and Flames in Ethiopian Opal (英語)
Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.
夢を追いかける「ヒッピー」のデザイナー兼鑑定士、地元の同窓支部に新たな活気を与える
GGであるRebecca Buysは、デザイナーと鑑定士としての充実したキャリアを築き上げ、カリフォルニア州サンディエゴのGIA同窓生を指導します。
Australian Opal Beads with Blue Play-of-Color
Boulder opal in sandstone matrix is seen as beads in Tucson.
Splendor in the Outback(奥地の輝き):オーストラリアのオパール産地への訪問 (英語)
Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah, and Quilpie.
Thai-Myanmar Petrified Woods
The properties of petrified woods originating from various localities in Thailand and Myanmar are examined.
Digital Photomicrography for Gemologists
A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.
Gemstones and Jewelry Inspired By Nature
At AGTA, exquisite jewelry pieces inspired by natural scenes were on view.
驚異的な昆虫
毛虫が蝶に変わるのと同じように、マスタージュエラーは素材をウェアラブルな芸術作品に仕上げます。 昆虫に対する先入観を捨て、別世界に足を踏み入れる準備をしてください。数え切れない程何度も通り過ぎていった、今まで気づかなかった世界かもしれません。
On the Origin of Digit Patterns in Gem Opal
An examination of the finger-like feature mostly found in Ethiopian opal, and proposal for its formation.
Dyed Purple Hydrophane Opal
Opals with an unusual purple bodycolor and strong play-of-color have recently appeared in the market.






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