Minerals By Liz Doro
Biotite mica lustre:non-metallic Cleavage Color:
or fracture? Cleavage
black to dark brown
Hardness:
softer than a fingernail
calcite Lustre:
non-metallic
Cleavage
or fracture? Cleavage
Color:white Streak
color: white
Hardness:
softer than glass but harder than a fingernail.
Feldspar Lustre:
non-metallic
Cleavage Colour: Streak
or fracture? Cleavage
varied
color: colorless
Hardness:
harder than glass
Fluorite Lustre:
non-metallic
Cleavage
or fracture? Cleavage
Color:
a variation of purple
Streak
color: colorless
hardness:
softer than glass but harder than a fingernail.
Galena lustre:
metallic
Cleavage
or fracture? Cleavage
Color:
gray
Streak
color: gray to black
Hardness:
softness of a fingernail.
Graphite Lustre:
metallic
Cleavage
or fracture? Cleavage
Color:
black to gray
Streak
color: black to gray
Hardness:
softer than a fingernail
gypsum Lustre:
non-metallic
Cleavage
or fracture? Cleavage
Color:
colorless
Streak
color: white
Hardness:
softer than a fingernail.
Halite Lustre:
non-metallic
Cleavage
or fracture: cleavage
Color:
colorless
Streak
color: colorless
Hardness:
softness of a fingernail.
Hematite Lustre:
metallic
Cleavage
or fracture? Fracture
Color:
dark silver or red
Streak
color: red, gray
Hardness:
harder than glass
Magnetite Lustre:
metallic
Cleavage
or fracture? Fracture
Color:
black
Streak
color: black
Hardness:
harder than glass
Muscovite mica Lustre:
non-metallic
Cleavage
or fracture? Cleavage
Color:
white
Streak
color: white
Hardness:
softness of a fingernail.
Pyrite Lustre:
metallic
Cleavage
or fracture? Fracture
Color:
brassy gold
Streak
color: greenish black
Hardness:
harder than glass
Quartz Lustre:
non-metallic
Cleavage
or fracture? Fracture
Color:
colorless
Streak
color: colorless
Hardness:
harder than glass
Sulfur Lustre:
non-metallic
Cleavage
or fracture? Fracture
Color:
yellow
Streak
color: yellow to white
Hardness:
softer than a fingernail.
Talc Lustre:
non-metallic
Cleavage
or fracture? Cleavage
Color:
white or greenish
Streak
color: white
Hardness:
softer than a fingernail.