Porphyry
Porphyry

Porphyry

Regular price €6.99 Sale

Porphyry.
Crystal: Porphyry. 

Country of origin: Arizona. 
Chemical composition: (K + Na)3Cu20Al3Si29O76(OH)16⋅∼8H2O.
Hardness based on Mohs scale: 7. 

Porphyry wikipedia