


Citrine Care and Cleaning
Learn about citrine's durability and how to care for your citrine jewelry.


Amber Description
Amber formed tens of millions of years ago, when sap from ancient trees hardened and fossilized.

Citrine Description
Citrine—the transparent, pale yellow to brownish orange variety of quartz—is rare in nature. In the days before modern gemology, its tawny color caused it to be confused with topaz.


珍珠描述
Perhaps the best-loved gems of all time, pearls—both natural and cultured pearls—occur in a wide variety of colors. Learn about the factors that make pearls so popular and desirable!

Opal Description
Opal is known for its unique display of flashing rainbow colors called play-of-color. There are two broad classes of opal: precious and common. Precious opal displays play-of-color, common opal does not.


Sapphire Journey
The name “sapphire” can also apply to any corundum that’s not ruby, another corundum variety


Sapphire Care and Cleaning Guide
Learn about sapphire's durability and how to care for your sapphire jewelry.
GIA 科学家评估稀世珍罕钻石


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类似石与仿制宝石材料简介
珠宝行业使用特定术语描述人造的和外观相似的宝石,即合成材料和类似石。它们之间的差别十分微妙,但极其重要。合成材料是指与天然宝石材料具有相同的化学组成、晶体结构以及光学特性和物理特性的人造材料。除此之外,还有一些材料本身看起来就像天然宝石。这些材料被称为类似石或仿品,可以是天然的,也可以是人造的。而替代品则是老术语,与类似石或仿品意思相同。

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