
A Solution to Diamond Color Grading Problems
GIA Gübelin(古柏林)宝石项目:各种宝石(磷锂铝石 — 斧石)
Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.
马达加斯加 Didy 地区出现大量红宝石和蓝宝石(2012 年 4-6 月)
据说产自 Batakundi/Basil 地区的蓝宝石
Abstracts; Fall 1991
本文摘自《宝石与宝石学》(Gems & Gemology) 1991 年秋季刊,是《宝石与宝石学》(Gems & Gemology) 外部发表的重要宝石学相关文章的摘要汇编。
祖母绿品质要素
Kunzite Care and Cleaning
Learn about kunzite's durability and how to care for your kunzite jewelry.

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