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Formula: As4S3
Sulphide, high-temperature paramorph of
dimorphite, arsenic-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.510 measured, 3.500 calculated
Hardness: 1 to 2
Streak: Saffron-yellow
Colour: Orange-yellow
Luminescence: Not fluorescent under UV
Environments
Paradimorphite is a new mineral, approved in 2022 and to date (May 2025) reported only from the type locality.
Localities
At the type locality, Solfatara di Pozzuoli, Pozzuoli, Naples, Campania, Italy, paradimorphite occurs as
orange-yellow prismatic crystals, transparent or semitransparent, with adamantine lustre.
(MM 86.3.500-506).
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