Tombstoneite

tombstoneite

jarosite

rodalquilarite

tellurium

Images

Formula: (Ca_0.5Pb_0.5)Pb₃Cu²⁺₆Te⁶⁺₂O₆(Te⁴⁺O₃)₆(Se⁴⁺O₃)₂(SO₄)₂.3H₂O
Tellurite, the first known finite complex including both Te⁴⁺ and Te⁶⁺ polyhedra in any natural or synthetic tellurium oxysalt structure (MM 87.1.10-17)
Crystal System: Trigonal
Specific gravity: 5.680 calculated
Hardness: About 2½
Streak: Pale green
Colour: Green
Tombstoneite is a new mineral, approved in 2021 and to date (November 2024) reported only from the type locality.

Localities

At the type locality, Grand Central mine, Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USA, tombstoneite occurs in quartz matrix in association with jarosite and rodalquilarite. Tombstoneite crystals are green pseudohexagonal tablets, up to 100 μm across and 20 μm thick (MM 87.1.10-17).

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