|
Chemical formula
|
SiO2 _ |
|
Crystalline system
|
trigonal |
|
Class
|
oxides |
| Origin | Minas Gerais, Brazil |
| Size | 2.0-3.0cm |
A Geodino is a micro-geode, in this case composed of quartz and agate.
Geodes are spherical or ellipsoidal cavities formed in the rocks in which some mineral has precipitated, forming sheets of crystals (quartz) or concentric bands (agate).
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.