A devitrified glass reminiscent of Victoria Stone is seen during the Tucson gem shows.

Blister pearls attached to shells are seen in both the Bangkok and New York laboratories.

A new source of sapphires is found in the Tigray region of Ethiopia.

Reviews diamond discoveries at the Lomonosov deposit, as well as the geology of the Arkhangelsk kimberlite province.

Demonstrates the importance of this method in identifying diamond treatments, based on the analysis of PL maps acquired from a brownish orange HPHT synthetic diamond.

Evaluates the usefulness of Raman spectroscopy in distinguishing the color varieties of nephrite based on the relative ratio of Mg to Fe concentration.

Presents a detailed examination of about 800 samples of carbonado diamond from Brazil and the Central African Republic, including possible models for its genesis.

Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.

A dichroic inclusion within a quartz crystal is found to be chlorapatite.

A rare mineral is found in a rock crystal quartz host.

A report from the GIA Laboratory in Bangkok analyzing 41 Cambodian-Thai rubies.

Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.

Review of Ruby & Sapphire: A Gemologist’s Guide

Farmers have experimented with bead nucleation, but until recently the methods tried did not produce the quantity or quality necessary for economic success.

2017 オークション シーズン見た 2 つのレコードの重要な価格下落と固体、春上がっていないトップの価格は軒並み宝石します。

2017 オークション シーズン見た 2 つのレコードの重要な価格下落と固体、春上がっていないトップの価格は軒並み宝石します。

デザイナーは市場のトレンドに対応し, ダイヤモンドの需要は予想よりも好調でした。また、ホリデーシーズンに向けたダイヤモンドのマーケティングキャンペーンでは資金調達の増加が期待されます。

カメオに潜む豊かな歴史および伝承が、歴史、神話や宝石をこよなく愛する方を魅惑的な収集の世界へ案内します。