Sapphire
At a glance
- Type
- Mineral
- Group
- Oxide
- Crystal system
- Trigonal
- Hardness
- Very hard (over 7.5)
- Colour
- Blue
- Lustre
- Glassy, Brilliant
- Use
- Gemstone
- Difficulty in WildGuessr
- Easy
Did you know?
- Synthetic sapphire resists scratches so well that it covers many watch faces and some camera lenses.
- The Greeks and Romans used the name sapphire for a gold-flecked stone, probably lapis lazuli.
Could you guess it from clues?
WildGuessr picks a secret animal, plant, fungus, stone, prehistoric creature or space object and you ask yes-or-no questions about it, such as its group or where it grows. The fewer clues you need, the more points you score.
Similar stones
Classification, names and conservation status come from Wikidata (CC0), the photo from Wikimedia Commons. Wikidata Q127583 · All stones · All entries