Rock crystal
At a glance
- Type
- Mineral
- Group
- Oxide
- Crystal system
- Trigonal
- Hardness
- Hard (5.5 to 7.5)
- Density
- Medium (2.5 to 3.2)
- Occurs in
- Igneous rocks, Metamorphic rocks, Ore veins
- Foliation
- Not layered
- Colour
- Colourless
- Lustre
- Glassy
- Use
- Jewellery, Industry
- Difficulty in WildGuessr
- Easy
Did you know?
- The word crystal comes from the Greek krystallos, meaning ice, the name first given to clear quartz.
- Some ancient writers believed rock crystal was ice frozen so deeply that it could never thaw.
Could you guess it from clues?
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Classification, names and conservation status come from Wikidata (CC0), the photo from Wikimedia Commons. Wikidata Q2050687 · All stones · All entries