
钻石描述
钻石是唯一一种由单一元素(碳)构成的宝石:其中的碳含量高达 99.95%。 另外 0.05% 可能是一种或一种以上的微量元素,这些原子不属于钻石的基本化学结构。 一些微量元素可以影响它的颜色或晶体形状。



莫桑比克北部的Niassa (尼亚萨) 和Cabo Delgado (德尔加杜角) 地区出产的红宝石
莫桑比克北部的Niassa (尼亚萨) 和Cabo Delgado (德尔加杜角) 地区出产的红宝石









尖晶石描述
The spinel used in jewelry is a small part of a group of minerals that share the same crystal structure. Not all of them form transparent crystals suitable for jewelry use, however. Spinel offers a range of hues, from orange to intense “stoplight” red, vibrant pink, and all shades of purple, blue, and violet through bluish green.



尖晶石的历史与知识
Spinel is a good candidate for the title of “History’s Most Underappreciated Gem.” Some ancient mines that supplied gems for royal courts from Rome to China produced spinel, but it was usually confused with better-known stones like ruby and sapphire.

尖晶石之旅
The Black Prince’s Ruby. The Timur Ruby. For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels

GIA Gübelin(古柏林)宝石项目:刚玉
几千年来,红宝石和蓝宝石(通常为蓝色,有时也有各种其他颜色)一直都是最重要的有色宝石。这些刚玉族矿物包含各种颜色类别,历史上原产于东南亚和中亚地区,如今由于它们珍贵稀有、色彩瑰丽、坚硬耐磨,已经成为备受追捧的宝石。由于有向分布的矿物内含物,刚玉可以呈现出星光和猫睛光,在不同的光源下观察时,有时还会变色。


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