
Elements in Synthetic Overgrowth on Flux-Heated Ruby and Beryllium-Diffused Sapphire
Synthetic overgrowth caused by two different types of treatment are found on two samples in the Tokyo lab.

Natural Freshwater “Fish” Pearl
A uniquely shaped freshwater pearl is examined in the New York lab.

Screening of Mounted Melee Using the GIA iD100
GIA’s new screening device accurately identifies an HPHT-grown melee diamond.

Unusual Bodycolors ofPrecious Opal
Two stones with unusual bodycolor are identified as precious opal.

Letters: Note on CVD Synthetic Overgrowth
A response to the Summer 2017 Lab Note on CVD synthetic overgrowth on a natural diamond.
Unusual Cloud in Diamond
A diamond with a previously unseen clarity characteristic is seen in GIA’s Carlsbad lab.

10 颗鲜艳的宝石带来栩栩如生的秋天色彩
颜色是 4C 标准的首要标准,也许最能将宝石特性体现得淋漓尽致。 从亮丽的蓝色和铁灰色到浓郁的棕色和火热的红色,宝石颜色五彩缤纷。 Pantone Color Institute 是设计师和时尚达人的色彩仲裁者,在其 2013 年秋季色彩报告中选择了 10 种最钟爱的颜色。 赋予其充满异国情调的名字,如爱莎伊 (Acai)、桑巴 (Samba) 和米科诺斯 (Mykonos) 蓝,预计这些时尚色彩将主宰金秋时节。








Natural Sapphire with Trapiche Pattern Inclusions
Arrays of hexagonal particle inclusions resemble a trapiche pattern in this natural sapphire.

Uvarovite in Prehnite from Pangasinan Province, Philippines
Vibrant green uvarovite garnet in a white prehnite matrix with lapidary potential discovered in the Philippines.



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