from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A rare purple fluorescent silicate mineral.
from The Century Dictionary and Cyclopedia
- n. A silicate of zinc and calcium (Ca2ZnSi2O7) which occurs in white granular masses at Franklin Furnace, in Hardyston township, Sussex county, N. J.
Hardystone + -ite, after Hardystone Township, New Jersey. (Wiktionary)
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