|
Chemical formula
|
SiO2 _ |
|
Crystalline system
|
trigonal, hexagonal |
|
Class
|
oxides |
| Origin | Minas Gerais, Brazil |
| Size |
Medium : 3.0-4.0 cm big : 4.0-5.0cm |
Massive transparent smoky Quartz in shades that vary from light to dark.
It is a variety of quartz of brown, gray and black tones. Its color is due to natural radiation in its formation process. It is easy to find smoky quartz all over the world.
The piece you receive may differ slightly from the photo shown as the minerals are natural and no piece is identical. The size is approximate.