Clue: Hard mineral such as amethyst or citrine
We have 1 possible answer for the clue Hard mineral such as amethyst or citrine which appears 1 time in our database.
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- Mineral used in modern timepieces
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- Colourless/white mineral
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- Amethyst or citrine
- Colourless mineral used in the manufacture of glass, abrasives and cement and as a gemstone