|
Chemical formula
|
Ca 2 Al(Si 3 Al)O 10 (OH) 2 |
|
Crystalline system
|
orthorhombic |
|
Class
|
silicates |
| Origin |
Kayes, Mali |
| Size | 2.0-3.0cm |
Precious crystals of Prehnite with a faint green color characteristic of this mineral.
It is used mainly for its scientific interest and collecting.
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.