Mtorolite is a rare green chrome chalcedony that occurs in one location in the world: Zimbabwe. Here it occurs as horizontally pitched veins that intrude decomposed serpentine bordering the Great Dyke.

According to Ian Campbel (pp 19-23) in the October 95 issue of The South African Gemmologist, mtorolite was named for the Mtoroshanga of Zimbabwe, the district that hosts the only known occurrence of this gem material in the world.

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