Sulfosalts
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▪ TableSulfosaltsname colour lustre Mohs hardness specific gravityargyrodite bluish to purplish black; steel gray when fresh metallic 2½ 6.1–6.3bournonite steel gray to iron black metallic 2½–3 5.8–5.9enargite gray black to iron black metallic 3 4.4–4.5polybasite iron black metallic 2–3 6.0–6.2proustite scarlet vermillion adamantine 2–2½ 5.6pyrargyrite deep red adamantine 2½ 5.8stephanite iron black metallic 2–2½ 6.2–6.3tetrahedrite flint gray to iron or dull black metallic 3–4½ 4.6–5.1name habit fracture or cleavage refractive indices or polished section data crystal systemargyrodite crystals and crystal aggregates; crusts; compact masses conchoidal to uneven fracture violet gray white; isotropic (canfieldite) or weakly pleochroic (argyrodite) isometricbournonite prismatic to tabular crystals; crystal aggregates; granular to compact masses subconchoidal to uneven fracture white; weakly anisotropic and very weakly pleochroic orthorhombicenargite tabular crystals; granular masses one perfect cleavage gray to light rose brown; strongly anisotropic; weakly pleochroic orthorhombicpolybasite tabular crystals; massive uneven fracture gray white; moderately anisotropic; weakly pleochroic monoclinicproustite prismatic crystals; compact masses one distinct cleavage omega = 2.979–3.088epsilon = 2.711–2.792 hexagonalpyrargyrite prismatic crystals; compact masses one distinct cleavage omega = 3.084epsilon = 2.881 hexagonalstephanite prismatic to tabular crystals; disseminated grains; compact masses subconchoidal to uneven fracture strongly anisotropic orthorhombictetrahedrite tetrahedral crystals; granular to compact masses subconchoidal to uneven fracture gray to olive brown; isotropic isometricSee as table:
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Universalium. 2010.
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