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The Challenges of Cutting a Large Gem Opal Rough
A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.
Australian Opal Beads with Blue Play-of-Color
Boulder opal in sandstone matrix is seen as beads in Tucson.
Hydrophane Opal Treatment
An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.
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。
New Deposit of Black Opal from Ethiopia
The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.
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.
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