A
agate
alexandrite
amber
amethyst
aquamarine
aventurine
azurite
B
basalt
beryl
C
calcite
carat
carnelian
chalcedony
citrine
coal
coral
crystal
D
density
diamond
dolomite
druze
E
emerald
F
facet
feldspar
fire opal
fluorite
fool's gold
fossil
G
garnet
gem
gemstone
geode
geology
gneiss
gold
granite
gravel
gypsum
H
hardness
hematite
howlite
I
igneous rock
inclusion
J
jade
jadeite
jasper
jet
K
karat
kunzite
L
labradorite
lapidary
lapis lazuli
lava
limestone
lithified
loess
luster
M
magma
magnetite
malachite
metamorphic rock
meteoroid
mica
mineral
moonstone
moss agate
N
nephrite
O
obsidian
opal
orthoclase
P
pebble
peridot
petrified wood
pumice
pyrite
pyroclastic flow
Q
quartz
R
rock
rock cycle
rose quartz
ruby
S
salt
sand
sandstone
sapphire
sard
sardonyx
schist
sedimentary rock
seismograph
semi-precious
serpentine
silica
silt
soapstone
sodalite
spinel
stalactite
stalagmite
stone
T
talc
talus
tiger's eye
topaz
tourmaline
tsavorite
turquoise
U
unakite
V
vitreous
volcanic bomb
volcanic glass
volcano
vulcanite
W
wairakite
X
xalostocite
xenolith
xyloid jasper
Y
yeatmanite
Z
zircon
zoisite
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4th - 5th
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