Collection: Beryl

Beryl is a general term for the mineral beryl, a category that encompasses the entire beryl group. It includes several types of gemstones that could be considered classic.

The color changes depending on the trace elements included. There are various types of beryl, from the well-known aquamarine and emerald, to the somewhat rare bixbite (red beryl), and even borobyevite, which is blue but not aquamarine, and the related abdibaite.

Here, we will introduce them collectively as "Beryl."

Name: Beryl
Japanese Name: Ryokuchūseki (緑柱石)
Chemical Composition: Be₃Al₂(SiO₃)₆
Crystal System: Hexagonal
Specific Gravity: 2.7-2.9
Mohs Hardness: 7.5-8
Cleavage: Indistinct
Luster: Vitreous
Transparency: Transparent to Translucent
Refractive Index: 1.57-1.60 (varies by type)
Birefringence: 0.005-0.009
Colors: Colorless, Green, Blue, Red, etc.
Dispersion: 0.014