marcasite
Concise Oxford English Dictionary © 2008 Oxford University Press:
marcasite /ˈmɑːkəsʌɪt, -ziːt/
▶noun
- 1 a semi-precious stone consisting of iron pyrites.
- 2 a bronze-yellow mineral consisting of iron disulphide but differing from pyrite in typically forming aggregates of tabular crystals.
- 3 a piece of polished steel or similar metal cut as a gem.
– origin ME: from med. L. marcasita, from Arab. marḳašīṯa, from Pers.
'marcasite' also found in these Oxford entries:
