Lee Downey, owner of Artifactual (Tucson, Arizona), spoke with us in early 2020 about his 35 years in the fossil ivory carving trade and the impact of ivory bans on his business.

There’s only one place on earth where the general public can prospect for diamonds directly from a primary kimberlite pipe: Crater of Diamonds State Park.

A master gem carver bases his latest design off a stunning stained glass window when attempting the world’s largest known cut kunzite.

Scientists in Russia construct an origin story through the analysis of petrified wood popularly used in the souvenir trade.

Gem silica, also known as “chrysocolla chalcedony,” is considered the most valuable variety of chalcedony.

Diaspore, an orthorhombic aluminum oxide hydroxide mineral with the formula AlO(OH), is a relative newcomer to the jewelry scene, with some stones possessing a captivating ability to change color between pale green, yellow, pink, and purple when viewed in different sources of light.

加利福尼亚州卡尔斯巴德– 10 月 13 日 — 随着消费者对实验室制造钻石越来越感兴趣，GIA（美国宝石研究院）进一步提升其消费者保护使命，推出了 GIA 实验室制造钻石证书 (LGDR) — 包括适用于实验室制造钻石的四种新版数字证书（仅提供数字版），证书中包含 4C 颜色和净度规格。而以前，GIA 的实验室制造钻石证书使用的是描述性术语和等级范围。

了解 GIA 如何解决业界所担忧的问题，即未经披露的实验室制造钻石和花式米粒钻仿品与天然花式米粒钻混在一起。

关于希腊劳里厄姆古代银矿的加注文献清单

对 GIA 专家而言，网络研讨会是一种轻松分享信息并与研究人员以及宝石和珠宝爱好者社区保持联系的非正式方式。

宝石学摄影记者 Robert Weldon（罗伯特·韦尔登）分享了他最喜欢的一些照片，并讲述了背后的故事。

An overview of the Spring 2020 Gems & Gemology content.

Violent kimberlite eruptions impact the surface features of diamonds, which can give scientists useful information about how diamonds react with the fluids in the mantle.

Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

Application of slight pressure perpendicular to the twinning planes reveals the unusual property of this synthetic gem.

A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.

A phenomenon resembling play-of-color was seen in a 4.13 ct unheated sapphire recently examined by the author.