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

Q

what is graphites streak

A

black

Q

what is graphites cleavage

A

perfect in one direction

Q

what is the lustre of graphite

A

metallic, sometimes submetallic/earthy

Q

what is the hardness of graphite

A

1-2

Q

what colour is gold

A

gold

Q

what is golds specific gravity

A

when pure 19.3

Q

what is galenas cleavage

A

perfect, cubic, 3 directions at right angles

Q

what is the specific gravity of gelena

A

7.4 - 7.6

Q

what is sphalerite’s special feature

A

looks like fire through handlens

Q

what is sphalerites cleavage

A

perfect 6 -> why it looks like fire

Q

what is sphalerites streak

A

white to yellowish brown

Q

what is sphalerites lustre

A

nonmetallic, submetallic, resinous

Q

what is cinnabars colour

A

bright red to brownish red, sometimes grey

Q

what is cinnabars specific gravity

A

8 to 8.2

Q

what is molybdenites colour

A

bluish grey to silver

Q

what is molybedenites streak

A

bluish gray to gray

Q

what is molybdenites hardness

A

1 to 2

Q

what is molybedenites crystal system

A

hexagonal

Q

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

A

cinnabar