Lab
Minerals
and
Mineral
Identification
1.
Quartzis
usually
colorless
in
color,
often
forms
six-sided
crystals,
and
has
no
cleavage.
2.
Calcite
is
usually
colorless/white/yellowish
in
color,
often
forms
rhombohedral
crystals,
and
has
good
non-cubic
cleavage.
The corners
on
a
crystal
have
75-degree
angles.
3.
Halite
is
usually
colorless/white
in
color,
often
forms
cubic
crystals,
and
has
good
cubic
cleavage.
The
corners
on
a
crystal
have
90-degree
angles.
4.
Pyrite
is
usually
brass-yellow
in
color,
and
often
forms
cubic
crystals.
The
corners
on
a
crystal
have
90-degree
angles.
5.
Galena
is
usually
silver/gray
in
color,
and
often
forms
cubic
crystals.
The
corners
on
a
crystal
have
90-degree
angles.
Specimen
1:
What
is
the
luster
of
the
mineral
Galena?
Metallic
Luster
Specimen
2:
What
is
the
luster
of
the
mineral
Sulfur?
Non-metallic
luster
Specimen
3:
Does
the
mineral
Calcite
have
cleavage
or
fracture?
Cleavage
Specimen
4:
Does
the
mineral
Quartz
have
cleavage
or
fracture?
Fracture
Specimen
5:
What
is
the
streak
color
for
the
mineral
Pyrite?
Why
would
a
mineral
NOT
leave
a
streak?
The
streak
color
is
greenish
black.
Minerals
that
are
harder
than
the
streak
plate
have
nostreak
or
colorless
streak.
Specimen
6:
What
mineral
reacts
with
acid?
Carbonate
minerals
Specimen
7:
What
mineral
tastes
salty?
Halite
