A is for Andesite rock
B is for Basalt rock
C is for Coal rock
D is for Dacite rock
E is for Eclogite rock
F is for Foid-Syenite rock
G is for Granite rock
H is for Hornblendite rock
I is for Impactite rock
J is for Jaspilite rock
K is for Kimberlite rock
L is for Limestone rock
M is for Marble rock
N is for Nodule rock
O is for Obsidian rock
P is for Pegmatite rock
Q is for Quartzite rock
R is for Rhyolite rock
S is for Scoria rock
T is for Travertine rock
U is for Ultramafic rock
V is for Volcanic bomb
W is for Wollastonite rock
X is for Xenolith rock