|
Chemical formula
|
SiO2 _ |
|
Crystalline system
|
trigonal |
|
Class
|
oxides |
| Origin | Minas Gerais, Brazil |
| Size |
Medium: 3.00-4.00 cm Large: 4.00-5.00 cm |
Agate in massive format in a greyish tone with the typical bands of the mineral.
The Agate is a set of microcrystalline varieties of quartz. Actually, they are varieties of chalcedony that have bands of various colors that depend on the number of inclusions that it has.
It is a hard rock and resistant to chemical reagents.
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.