Mineralogy Database

Opaque Minerals sorted by Mineral Name

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   794 Opaque Minerals Sorted by Mineral Name

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Refractive Index
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Mouseover Mineral Name: IMA Status
Mineral Name Reflected Light Color Bireflectance Anisotropism Pleochroism Diaphaneity Reflectivity
Record Count
Acanthite # none weak none Opaque 32
Aguilarite # very weak Opaque 32
Aikinite # white, cream distinct cream white to pure white or light brown Opaque 32
Aktashite  white weak in shades of blue Opaque
Alabandite # gray white Opaque 32
Alacranite  light gray with rose-yellow internal reflections Transparent 26
Aleksite  light pale gray with slight greenish tint weak Opaque 26
Algodonite # bright cream white weak Opaque 32
Allargentum # weak Opaque 32
Altaite # white with a delicate greenish hue Opaque 32
Alumotantite  observed Transparent 6
Anatase # weak Transparent to translucent 32
Andorite # white Opaque 32
Andreyivanovite ! creamy white Opaque
Anduoite  white with pink tint marked in air from brownish yellow to grayish green, pale red to pale green, pronounced in oil noticeable in air, from pinkish grayish white to pinkish white, distinct in oil Opaque
Angelaite ! yellowish to brownish with no internal reflections moderate distinct Opaque 8
Ankangite  light rose-reddish gray weak to distinct distinct Opaque 2
Antimony # weak in air, lively in oil very feeble Opaque 32
Arcubisite  light gray with faint olive-brown tint distinct in air, strong in oil, cream to bluish green Opaque 24
Ardaite  distinct distinct Opaque 14
Argentopentlandite  cinnamon-brown Opaque 32
Argentopyrite # white, bright gray strong, deep blue to pale blue-gray Opaque 32
Argentotennantite  light gray to greenish gray Opaque 32
Argutite  distinct Transparent to Opaque 32
Argyrodite # gray-white with a violet tint weak very weak Opaque 80
Armalcolite  gray to tan strong, pale gray to dark bluish gray observed Opaque 16
Arsenic # distinct, yellow brown and light gray to yellowish gray feeble Opaque 32
Arsenolamprite # weak Opaque 30
Arsenopalladinite  white with yellowish creamy tint strong, red and golden brown to blue-gray in air, khaki-brown to blue gray in oil Opaque 32
Arsenopyrite # white, faint yellow tint strong, red-violet weak, white with bluish tint to faint reddish yell Opaque 32
Arsenosulvanite ? distinctive yellowish brownish tint Opaque 32
Arsenpolybasite  weak Opaque
Aschamalmite  creamy white moderate, from gray to red-brown Opaque 38
Ashanite ? pale bluish gray Opaque 28
Asisite  gray with internal reflections weak in oil, gray, not noticable in air Transparent 32
Athabascaite  strong, creamy white to dark blue distinct, light gray to blue-gray Opaque 32
Atheneite  white with bluish tint distinct very weak, in pale yellow-white to bluish gray-white Opaque 32
Atokite  light cream slight due to strain none to slight Opaque
Auricupride # violet rose Opaque
Aurivilliusite ! resembles cinnabar, light sensitive, no internal reflections, shows red light coalescing phenomenon Opaque
Aurorite  strong, cream white to medium black yellow-gray to brownish gray Opaque 32
Aurostibite # white with pink tint Opaque 32
Avicennite # pale to medium gray Opaque 14
Babkinite ! yellowish white almost absent distinct weak, bluish brown tints Opaque 8
Balkanite  white gray strong Opaque 24
Barquillite ! gray with a pale violet tint very weak very weak very weak Opaque 32
Barstowite  white with abundant colorless internal reflections moderate, gray to dark gray weak to moderate Transparent to Opaque 32
Bartonite  yellowish green-gray to yellowish green-brown very weak Opaque 32
Batiferrite ! pale gray distinct in air, weak in oil moderate none Opaque 16
Baumhauerite  white with deep red internal reflections strong, colorful in green, violet, blue-green or yellow Opaque 32
Baumstarkite ! gray to white weak to moderate strong to weak none Opaque 64
Bellidoite  creamy white very weak in gray colors very weak Opaque
Benavidesite  white with a greenish tint with rare dull red internal reflections. strong with tints of brown and blue weak Opaque 32
Benjaminite # creamy white to very pale brownish strong Opaque 32
Benleonardite  very pale blue moderate to strong, in tints of brown, blue, and gray Opaque 32
Berdesinskiite  reddish brown weak Opaque 32
Berryite  gray white distinct to strong, from gray-white to red-brown weak to distinct Opaque
Berthierite # gray strong marked Opaque 32
Berzelianite # isotropic, sometimes anisotropic Opaque 32
Betafite # almost colorless Translucent to Opaque 32
Betekhtinite # bright cream parallel to elongation, stronger yellowish cream perpendicular strong, distinctly colored Opaque 32
Bezsmertnovite  bright orange yellow weak, in neutral gray shades Opaque 30
Bismuth # white, brilliant creamy distinct feeble Opaque 32
Bismutohauchecornite  weak moderate Opaque
Blatterite  exhibits red-orange internal reflections buff, creamy buff, pale buff weak to distinct, in shades of grayish brown Opaque 32
Blossite  white, with red-brown internal reflections weak to moderate, in shades of cream-white moderate, gray to creamy gray-brown Opaque 8
Bohdanowiczite  pale creamy yellow to pink noticeable, distinctly stronger in oil, in yellowish gray tones Opaque 8
Borishanskiite  gray white barely noticeable to moderate, in yellowish gray tones Opaque 20
Bornite # brown, pinkish weak weak but noticeable Opaque 32
Borovskite  white isotropic to slightly anisotropic Opaque
Boulangerite # distinct weak Opaque 32
Bournonite # weak in air very weak Opaque 32
Bowieite  pale gray to pale gray-brown weak, dark gray to very dark brown Opaque 32
Braggite # white distinct, in purplish and pinkish shades of gray and brown Opaque 32
Breithauptite # light copper red with violet tint very noticeable in air and oil very distinct Opaque 32
Brezinaite  brownish gray Opaque
Briartite  gray to gray blue weak in air, distinct in oil Opaque 32
Brodtkorbite ! white strong weak to strong weak to moderate Opaque 16
Bukovite  weak, creamy gray to gray Opaque 32
Bursaite ? white strong, in gray-bluish and yellowish colors weak, white with blue tint to brown to light gray Opaque
Cabriite  pink with slight lilac tint strong, in grayish brown to golden colors detectable Opaque 28
Cadmium  tin white with bluish tint Opaque
Cadmoindite ! gray with brown-red internal reflections none none none Translucent 8
Cadmoselite # light gray in air, slightly brown in oil with brownish internal reflections weak Translucent to Opaque
Calaverite # white weak weak Opaque 32
Calvertite ! pale bluish gray none none none Opaque 8
Cameronite  distinct, medium gray to slate-gray to brownish gray slight, pale gray to pale brownish gray Opaque 32
Canfieldite # gray white with violet tint Opaque 32
Cannizzarite # strong, from blue to gray Opaque 32
Carlinite  white with faint bluish cast moderate to distinct brownish gray to bluish gray Opaque 8
Carlsbergite  light gray with a rose-violet tint Opaque 8
Cassiterite # light gray with white to brownish internal reflections strong strong to very weak Transparent to translucent to opaque 32
Catamarcaite ! grayish white with a distinct brownish tine with red internal reflections very weak in oil, absent in air weak in shades of gray none Opaque 80
Cattierite # white Opaque 32
Cechite  gray white with a yellowish tint, whitish, yellowish or rosy internal reflections weak to imperceptible perceptible to strong, light gray to dark gray with brownish tint Opaque 30
Cernyite  very weak in shades of gray Opaque 8
Cesplumtantite  weak strong Transparent 8
Chabourneite  white with red internal reflections noted along cracks strong, in bluish and greenish colors weak Opaque 32
Chalcocite # weak Opaque 32
Chalcophanite # white with deep red internal reflections very strong very strong, in gray and white Opaque 32