|
Chemical formula
|
SiO2 _ |
|
Crystalline system
|
trigonal |
|
Class
|
oxides |
| Origin | Rio Grande Do Sul, Brazil |
| Size | 2.0-3.0cm |
Massive greyish agate in various shades.
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 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.