Taxonomic Key For the Forms of Quartz 1a) Mineral has six-side hexagonal crystals and visible crystal facets 1b) Mineral has no visible crystal facets.

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Presentation transcript:

Taxonomic Key For the Forms of Quartz 1a) Mineral has six-side hexagonal crystals and visible crystal facets 1b) Mineral has no visible crystal facets. Go to 3) Go to 2)

3) Quartz Crystals Chert Jasper

Crystalline Quartz 3a) Rock Crystal 3b) Amethyst

Crystalline Quartz 3c) Citrine Rose Quartz Crystals (only in museums)

Crystalline Quartz 3d) Smoky Quartz (Bonus)

Taxonomic Key 2a) Mineral consists of glassy or pearly luster (transparent) 2b) Mineral appears waxy or subvitreous (translucent) Go to 4) Go to 7)

Taxonomic Key 4b) Mineral has glassy crystal chunks Go to 6) Go to 5)

5) Massive Crystalline Quartz 5a) Milky Quartz5b) Rose Quartx

Massive Crystalline Quartz 5c) Aventurine

Massive Crystalline Quartz 5d) Tiger Eye

Jasper 6) Noncrystalline Quartz - Opal 6a) White Opal 6b) Black Opal

Jasper 6) Noncrystalline Quartz - Opal 6a) White Opal 6c) Fire Opal 6a) White Opal

6) Noncrystalline Quartz - Opal 6d) Common Opal SEM Image of Opal

6d) Common Opal 6) Noncrystalline Quartz - Opal

7/9) Cryptocrystalline Quartz - Translucent Chalcedony

Cryptocrystalline Quartz - Translucent Carnelian

Cryptocrystalline Quartz Chrysoprase

Cryptocrystalline Quartz - Opaque Flint Chert

10) Cryptocrystalline Quartz - Opaque Jasper

Cryptocrystalline Quartz - Opaque Bloodstone

11) Cryptocrystalline Quartz - Banded Agate

Cryptocrystalline Quartz - Banded Black Onyx Cave Onyx

Cryptocrystalline Quartz - Banded Petrified Wood

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