Chalcedony
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, Sedimentary rocks
- Foliation
- Not layered
- Colour
- White, Grey, Blue, Brown
- Lustre
- Glassy, Dull
- Use
- Jewellery
- Difficulty in WildGuessr
- Medium
Did you know?
- Chalcedony is made of quartz crystals so tiny that they can be seen only under a microscope.
- The name probably comes from Chalcedon, an ancient Greek town on the Bosporus, now part of Istanbul.
Could you guess it from clues?
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Similar stones
Classification, names and conservation status come from Wikidata (CC0), the photo from Wikimedia Commons. Wikidata Q170448 · All stones · All entries