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Chemical formula
|
SiO2 _ |
|
Crystalline system
|
trigonal, hexagonal |
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Class
|
oxides |
| Origin | Minas Gerais, Brazil |
| Size | 2.0-3.0cm |
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 mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.