历史读物：产自印度的珍珠
历史读物 - 缅甸红宝石矿
美国淡水珍珠的诱惑︰ 重访 Latendresse（拉藤德烈斯）家族
John Latendresse（约翰·拉藤德烈斯）被誉为美国养殖珍珠之父。 他还是一位伟大的天然珍珠收藏家，为其家族留下了可观的天然珍珠藏品。 Latendresse（拉藤德烈斯）家族在美国的珍珠行业备受推崇，长久以来，一直支持着 GIA 的珍珠研究。 请跟我们一起来重访这一家族和他们的珍珠藏品。
Brazilian Diamonds: A Historical and Recent Perspective
Recounts the history, geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production.
Causes of Iridescence inNatural Quartz
Describes the occurrence of iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District.
An Inside Look at the 2017 Tucson Shows
An overview of the trends reported at the 2017 Tucson gem shows.
Tourmaline and Sapphire from Nigeria
An update on Nigerian colored stone production is obtained at the Tucson gem shows.
“Boldly Go” with a Southwest-Inspired Starship Enterprise
An eye-catching replica from a cult TV favorite is found in Tucson.
Multi-Elemental Diffused and Melt-Grown Synthetic Sapphire
GIA examines a multi-elemental diffused and melt-grown synthetic sapphire for the first time.
Pink Sapphire Filled with Bismuth-Based Glass
A sapphire with a color not commonly seen in the lab is found to have a glass filling.
HPHT Synthetic Diamond Melee Without Si or Ni Defects
Quality assurance testing in the Bangkok lab reveals HPHT synthetic melee in larger sizes.
Ametrine Optical Dishes: Windows into the Effects of Crystal Structure
Optical activity is studied using a polished block of ametrine.
埃塞俄比亚蛋白石中的闪光和火焰 (英语)
Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.
Quarterly Crystal:Mystery in Topaz
A topaz hosting a group of inclusions is examined in the Carlsbad lab.
Brazil’s Enigmatic Diamonds, Cuprian Liddicoatite, and Silicon in Corundum
An overview of the Spring 2017 Gems & Gemology content.
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