a semi-precious stone consisting of iron pyrites 白铁矿石(一种次贵重宝石) ■[mass noun]a bronze-yellow mineral consisting of iron disulphide but differing from pyrite in typically forming aggregates of tabular crystals 黄铁矿 ■a piece of polished steel or a similar metal cut as a gem 磨钢装饰石
语源
late Middle English: from medieval Latin marcasita, from Arabic mar kaŝ ṯa, from Persian