This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This article provides identification criteria to distinguish between modern and fossil (mammoth) elephant ivory.

Detected mineral components—jadeite and quartz, with reddish orange portions of cinnabar—shed light on a purple bead’s possible origin.

Commentary on a 2013 German article, translated as

The authors present the mineralogical and gemological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.

Gemological examination of two near-colorless, isotopically pure, carbon-12 synthetic diamonds grown recently by General Electric reveals short-wave ultraviolet luminescence behavior, a cathodoluminescence pattern, and small metallic inclusions that are typical of other gem-quality synthetic diamonds.

Two dark brownish red faceted stones, recently submitted to the GIA Gem Trade Laboratory for standard origin-of-color reports, were found to be treated synthetic diamonds.

This report focuses on recent products from Yehuda/Diascience, Koss & Schecter Diamonds (Genesis II), and Clarity Enhanced Diamond House (a subsidiary of Goldman Oved Diamond Co.).

This article presents the methods and instruments needed to analyze the internal growth structures of corundum.

Tourmalines from an alluvial deposit near Lundazi in Zambia consist of color zoned pink/colorless/yellow-green “watermelon” nodules.

并不是所有被称为“日光石”的长石均来自长石家族同一分支 — 正长石和斜长石种别都包含日光石长石类别。 日光石的得名源于宝石外观，而不是其化学构成。

19 世纪初期，日光石鲜为人知，极为罕见，且十分昂贵。 在挪威、西伯利亚以及世界其他地区发现日光石后，日光石便开始为人熟知，货源更充足，价格相对下降。

了解土耳其石的坚固性，以及如何保养土耳其石珠宝。

土耳其石的光彩和净度可能比不上红宝石、祖母绿和蓝宝石等透明有色宝石，但它丰富的历史和赏心悦目的颜色仍然让它非常受欢迎。 它的颜色范围可以从暗绿色到草绿色，再到明亮、中等色调的天蓝色。

土耳其石是世界上最古老的宝石之一。 考古发掘显示古埃及的统治者用土耳其石珠宝作为装饰，而中国工匠早在 3,000 多年前就已雕刻土耳其石。

土耳其石的品质通常根据三个基本质量要素判断：颜色、纹理以及是否存在母岩。了解土耳其石的更多信息，找到这种宝石如此抢手的原因！