Rocks 4 the lab Flashcards by Ellen Marion

Q

What streak colour is Fluorite?

A

White

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Q

What hardness is Fluorite

A

4 -> soft

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Q

What is a distinguishing feature of bornite

A

it is the peacock ore

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Q

What is the streak of bornite

A

greyish black

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Q

what is the hardness of bornite

A

3

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Q

What streak is halite

A

white

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Q

what is the hardness of halite

A

2.5

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Q

what is the specific gravity of halite

A

2

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Q

what does halite taste like

A

salt

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Q

what shape does halite make

A

cubes -> has perfect cleavage in 3 directions

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Q

what does sylvite taste like

A

bitter

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Q

what shape does sylvite make

A

cubes, 3 perfect cleavage planes

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Q

what is scheelites specific gravity

A

5.9 to 6.1

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Q

what is scheelites crystal habit

A

prismatic, tabular

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Q

what is scheelites fracture

A

conchoidal

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Q

what is apatites crystal system

A

hexagonal

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Q

what is the colour of apatite

A

could be any, but will be vibrant

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Q

is apatite brittle

A

yes lol

Q

what colour is copper

A

copper with blueish green tarnish sometimes

Q

what is coppers specific gravity

A

8.9 (supppppper heavy)

Q

what is the colour of sulfur

A

yellow

Q

what is unique about sulfur

A

smells bad

Q

what is sulfurs cleavage

A

none

Q

what is the hardness of sulfur

A

1.5 - 2.5

what is graphites streak

black

what is graphites cleavage

perfect in one direction

what is the lustre of graphite

metallic, sometimes submetallic/earthy

what is the hardness of graphite

1-2

what colour is gold

gold

what is golds specific gravity

when pure 19.3

what is galenas cleavage

perfect, cubic, 3 directions at right angles

what is the specific gravity of gelena

7.4 - 7.6

what is sphalerite's special feature

looks like fire through handlens

what is sphalerites cleavage

perfect 6 -> why it looks like fire

what is sphalerites streak

white to yellowish brown

what is sphalerites lustre

nonmetallic, submetallic, resinous

what is cinnabars colour

bright red to brownish red, sometimes grey

what is cinnabars specific gravity

8 to 8.2

what is molybdenites colour

bluish grey to silver

what is molybedenites streak

bluish gray to gray

what is molybdenites hardness

1 to 2

what is molybedenites crystal system

hexagonal

if a crystal shows up in a bag, what is it

cinnabar