Unique natural conch pearls are studied in the New York lab.

A submission to the New York lab yields an unexpected reaction to long-wave UV radiation.

A rough aquamarine crystal shows an unexpected phenomenon.

A yellow cultured pearl necklace is compared to the work of a producer specializing in freshwater pearls of all colors.

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.

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.

Raman analysis identifies unusual inclusions in quartz.

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

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

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。

Buyers at the 2017 JCK Show will likely stick to their open-to-buy plans, but take few chances on new lines or extra stock. Plus: An overview of retail sales, auction headlines.