- a big clavate spine of a fossil sea-urchin.
- The clavated fossil back of an extremely big egg-shaped echinus.
- The basalt capping the coal-measures in the Titterstone and Brown Clee hills in Shropshire, The united kingdomt; in addition, your local name of a limestone-bed of the White Lias (Rhætic) in Somersetshire.
- Crystallized metal pyrites or pyrite, early used as a gem.
Equivalent for "jew's-stone"
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