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Quartz can be identified by:

1. Luster: nonmetallic

2. Hardness: 7

3. Streak: white

4. Color: usually colorless, white or gray but can be varieties of all colors

5. Cleavage: none

6. Crystal habit: hexagonal prisms and pyramids

7. Specific Gravity: 2.6-2.7

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15y ago
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15y ago

Visually, if crystals are present. The quartz crystal is six sided, terminated with a six sided pyramid.

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11y ago

Their hardness

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11y ago

Hardness

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Q: What are quartz mineral samples identified by?
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Quartz is an Oxide Mineral.


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the mineral that has a hardness of 7 is "Quarts