Amethyst is the purple variety of the quartz mineral species and the gem most commonly associated with the color purple.

Learn about the factors that make amber so desirable.

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

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.

Learn about the factors that make alexandrite so desirable.

Aquamarine is the green-blue to blue variety of the mineral beryl.

海蓝宝石因海水而得名，其清新水润的色调如同畅游在清凉的泳池中。

Learn about the factors that make citrine so desirable.

了解人们如此热衷于拓帕石的原因。

Learn about amber's durability and how to care for your amber jewelry.

Amber is probably best known for its insect and other types of inclusions.

Learn about amethyst's durability and how to care for your amethyst jewelry.

Learn about aquamarine's durability and how to care for your aquamarine jewelry.

The name “aquamarine” is derived from two Latin words: aqua, meaning “water,” and marina, meaning “of the sea.”

Learn about the factors that make aquamarine so desirable.

宝石不仅外表惊艳脱俗，还隐藏着一个肉眼看不见的美丽世界。

Learn about alexandrite's durability and how to care for your alexandrite jewelry.

王五一的研究领域包括钻石地质学和地球化学、高温高压实验、宝石学、经处理钻石及实验室培育钻石的鉴定。

Yun Luo（罗云）专门研究矿物学、计量学、质量控制。