SAMPLE OF HORNBLENDA CRYSTALS FROM THE CARBONERAS AREA, ALMERIA. VERY GOOD PIECE WITH A VARIETY OF CRYSTALS OF DIFFERENT SIZES ON THE MATRIX. PIECE THAT CANNOT BE MISSING IN YOUR COLLECTION.
The name of hornblende is the informal name with which the minerals of the amphibole group have been called, with the color between black and dark green.
There is actually no such mineral.
