,Hypocrystalline – crystals + glass Holocrystalline – 100% crystals
Plane light
glass
X polarized light
, Aphanitic
Phaneritic
0 5 10 mm
Fine-grained (<1 mm)
Medium-grained (1-5 mm)
Coarse-grained (5-30 mm)
Plane light
glass
X polarized light
, Aphanitic
Phaneritic
0 5 10 mm
Fine-grained (<1 mm)
Medium-grained (1-5 mm)
Coarse-grained (5-30 mm)