the 9 annoying minerals that have white streaks Flashcards
1
Q
black physical colour
A
Amphibole
2
Q
reddish brown physical colour
A
Garnet
3
Q
transparent
A
muscovite
4
Q
HCl reaction
A
Calcite
5
Q
Harder then metal nail
A
garnet (reddish brown), olivine (yellowish green), quartz (clearish) (>6.5)
6
Q
between metal nail and glass
A
plagioclase (white physical colour, Na rich), orthoclase (pinkish/ colourless/ white most common, K-rich) (5.5-6.5)
7
Q
between glass and fingernail
A
calcite (2.5-5.5)
8
Q
weaker then fingernail
A
muscovite, gypsum <2.5
