MINERAL
Active filters
Quartz from Madagascar with chlorite inclusions on black base
Menilite Opal from Agramon (Spain) in matrix
Turquoise howlite on black base
Black Tourmaline crystal with Hematite 1.5KGr on black base
Set of 4 minerals on cubes: cubic Pyrite on matrix, optical Calcite, Chalcopyrite, Dodecahedral Pyrite.