CLEAVAGE
All minerals have a crystal form, but not all have cleavage.
No. For it to be organic there would have to be pieces of once living things in it such as fossils.
Calcite's cleavage is a perfectional, 4 directional rhombohedron shape.
Yes, all different samples of that mineral will have the same cleavage.
Porphyry of Gaza was born in 347.
Porphyry is a type of granite that comes in various colors, that the Egyptians were known to appreciate carving things like coffins in. A stone coffin carved of porphyry is a porphyry sarcophagus.
Porphyry of Gaza died on 420-02-26.
cleavage....
Galena's cleavage is cubic.
Lots
10
Sulfur's cleavage is imperfect.
Silvers Cleavage Is Silver Doesn't Split .
Cobalt has a cleavage in three directions, forming a cube.
no cleavage
Show cleavage? What Cleavage? Not really