Feature Gems & Gemology, Fall 2014, Vol. 50, No. 3 Observations on Pearls Reportedly from the Pinnidae Family (Pen Pearls) Nicholas Sturman, Artitaya Homkrajae, Areeya Manustrong, and Nanthaporn Somsa ...

Stability Amber burns at relatively low temperatures. With prolonged exposure to light it might darken, and it can be damaged by chemicals. Cleaning The only safe way to clean amber is with warm, ...

Identification challenges related to Chemical Vapor Deposition (CVD) synthetic diamonds ...

消費者が、外観を変化させるために処理された宝石に市場で出会う可能性は常にあります。 ある宝石が処理されているかいないか、ということはよく話題になります。 ある意味では、人間は地中で発見される すべての 宝石素材に、宝飾品として使用するために変化を加えると言えます。 天然 ...

A synthetic gem material is one that is made in a laboratory, but which shares virtually all chemical, optical, and physical characteristics of its natural mineral counterpart, though in some cases, ...

This self-paced eLearning course lets you study at your convenience from your home or office and covers how to describe diamond jewelry accurately for effective and ethical sales conversations with ...

Tanzanite is one of the most popular colored gemstones in the world.- Courtesy Tanzanite Foundation ™ Tanzanite is a versatile gemstone that comes in a variety of sizes and cutting styles. Although it ...

Figure 1. This 2.39 ct transparent opal with a light brownish yellow bodycolor possessed a six-rayed star. Photo by Lhapsin Nillapat. Opal is best known for displaying play-of-color. It may also ...

Reports on the internal features and spectroscopic and trace-element analysis of sapphires reportedly from Badakhshan, Afghanistan.

Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the ...

拓帕石在莫氏硬度表中位居第 8 硬度和韧度 莫氏硬度用以衡量宝石和矿物的硬度。 这些数值基于一种矿物可被其他物品划伤的相对难易程度得出。 但莫氏硬度易产生误导。 矿物之间的等级差距并不相等。 举例来说，钻石仅比刚玉高一个等级，但其硬度却比刚玉坚硬许多倍。 由于其基底劈裂的特性 ...

Garnet comes in as wide a variety of sizes and shapes as it does colors. Garnets are a group that includes a number of different minerals, so appearance can vary widely. The first thing a buyer of ...