Characterization of Colorless Coated Cubic Zirconia (Diamantine)
Over the past several years, diamond simulants have entered the market that consisted of colorless cubic zirconia reportedly coated with a thin layer (e.g., represented to be 30–50 nm) of nanocrystalline diamond particles embedded in a matrix.

An Opal-Calcite Composite
Gem Testing lab in Jaipur, India recently examined a white-brown, translucent to opaque oval cabochon that turned out to be a composite featuring an unusual combination of gem materials.
Synthetic Moissanite: A New Diamond Substitute
Synthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterize it.
Sapphire Chart Article: Suggested Reading on Sapphires and Their Inclusions
Suggested Reading on Sapphires and their Inclusions
Suggested Reading on Emeralds and their Inclusions
Suggested Reading on Emeralds and their Inclusions

おしゃれな化石アンモライト
VA(Veterans Affairs、退役軍人)の GI Bill® (復員兵援護法)に基づく教育給付金
GI Billは、GIAなど非大学の学位(NCD)を取得できる機関で研修を受けるために利用できます。 Department of Veteran Affairs(退役軍人省)が、各教育機関のプログラムを個別に査定します。

Update on Ammolite Production from Southern Alberta, Canada
There have been a number of changes in Ammolite production from southern Alberta, Canada, since 2001.




作業ヒント#7: ラウンドファセットカットされた石をベゼルセットするための修正ツール
この記事は、ラウンドファセットカットされたストーン石をベゼルセットするためのツールを変更する方法について説明します


Bismuthinite Inclusions in Rose Quartz from Madagascar
Eye-visible inclusions are common in almost all quartz varieties except rose quartz.

Anahí’s “New” Ametrine
The Anahí mine in southeastern Bolivia has enjoyed consistent production since 1990 and is best known for its ametrine.

.jpg)


