Rocks Minerals Definitions
Aphanitic rock refers to a rock in which the crystalline constituents are too small to be distinguished without magnifiion. Apophyllite Apophyllite is a phyllosilie. It has a relative hardness of 5. It is a hydrothermal mineral filling cavities in basalt and tufaceous rocks. Associated with stilbite, scolecite, calcite, prehnite, analcime ...