Crystal Yellow Aventurine

Chemical Formula

SiO₂

Color

Blue, Green, Yellow, Orange, Brown, Gray

Hardness

6.5 - 7

Crystal System

Hexagonal

Refractive Index

1.54 - 1.55

SG

2.63 - 2.65

Transparency

Opaque. May be translucent when backlit on the edges.

Double Refraction

.009

Luster

Vitreous, waxy

Cleavage

Indiscernible

Mineral Class

Quartz / Chalcedony