Index of Samples By Content
A
Apatite
- Cut cabochon, with Mn activator ions
- Veins
- in dolomite/carbonatite matrix
- primary and hydrothermal, in carbonatite
C
Calcite
D
Diamond
Dolomites
F
Feldspar
- Authigenic
- Barium feldspars in calcite
- K-feldspar
- Sierran (PDF file)
- with quartz in rhyolite
- with overgrowth
Fossil
G
L
Limestone
M
Mountains and Volcanoes
N
O
P
Q
Quartz
R
S
Sapphire (synthetic leucosapphire)
T
X
Xenotime
