This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A brass-colored mineral, FeS2, occurring widely and used as an iron ore and in producing sulfur dioxide for sulfuric acid. Also called fool's gold, iron pyrites.

n. The common mineral iron disulfide (FeS2), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.

n. Any metallic-looking sulphide, such as the above, which is the most common.

n. (usually as a plural: pyrites) Any metal dichalcogenide that is isostructural to the common mineral.

n. A common mineral of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system; iron pyrites; iron disulphide.

n. Native iron disulphid (FeS2), a very common mineral, occurring in isometric crystals, cubes, octahedrons, pyritohedrons, etc., and also, and more often, massive.

n. a common mineral (iron disulfide) that has a pale yellow color

"Dr. HENNIGH: The fine sparkle you see is pyrite, which is fool's gold."

mineral   

pyro-    pyr-    pyric   

pyritic    chalcopyrite   

fool's gold    pyrites    iron   

plomb    quartzite    magnetite       chert    hornblende    ironwood    suthin    latinurn    hematite