very fine grain, excellent rock
cleavage
slate
glossy satiny sheen
phyllite
platy or scaly
appearance due to
visible mica crystals
schist
banded rock with alternating
dark and light minerals common
gneiss
predominantly
dark minerals
amphibolite
may look banded due to
interbedded shales
marble
green with
slippery feel
serpeninite
fine-grained,
dark, dense,
dull rock
hornfels
only forms by contact
metamorphism
hornfels
will effervesce
in dilute HCl
marble
conchoidal fracture, low specific
gravity
parent rock was
basalt or gabbro
anthracite
amphibolite
parent rock was
peridotite
parent rock was
shale
serpeninite
slate, phyllite,
schist, gneiss,
hornfels
parent rock was
granite
gneiss
parent rock was
limestone or
dolostone
marble
parent rock
was sandstone
quartzite
parent rock was
peat or
bituminous coal
anthracite
low-grade
metamorphism
of shale
slate
crenulations common
phyllite
parent rock not
important
nonfoliated rock
composed of calcite
hornfels
marble
foliated rock
slate, phyllite,
schist, gneiss,
amphibolite
nonfoliated rock
marble, quartzite,
serpentinite,
hornfels,
anthracite,
amphibolite
soft rock
used for statues
hard nonfoliated
rock composed
of silica
marble
quartzite
California State
Rock
serpentinite
primarily
composed of
one mineral
serpentinite,
marble,
quartzite