Mineralogy Database

Opaque Minerals sorted by Mineral Name

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   794 Opaque Minerals Sorted by Mineral Name

Color
Refractive Index
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Mouseover Mineral Name: IMA Status
Mineral Name Reflected Light Color Bireflectance Anisotropism Pleochroism Diaphaneity Reflectivity
Record Count
Fetiasite  creamy white noted along grain boundaries Opaque 8
Fettelite ! grayish white moderate white to brownish gray weak with strong red internal reflections Subopaque to Opaque 8
Filipstadite  gray, with amber-orange, brown, or red internal reflections weak, in shades of dark brownish gray Opaque 32
Fischesserite  pink none none Opaque 8
Fizelyite # shown, but without distinct color effects Opaque 32
Fletcherite  creamy white Opaque 12
Florenskyite ! creamy white Opaque
Franckeite # weak Opaque 32
Frankhawthorneite  pale gray with viridian-green internal reflections weak weak, somber brown Transparent 32
Franklinite # white to gray, with dark red internal reflections Opaque 32
Freboldite # similar to nickeline, but more intense violet in oil less than nickeline Opaque
Freieslebenite # just noticeable very weak Opaque 32
Friedrichite  creamy yellowish white in air, more pinkish in oil strong in oil, distinct in air Opaque
Frohbergite # white with bluish or pinkish tint strong, orange-red to inky blue extremely weak Opaque 32
Froodite # creamy white evident, in light and dark grays Opaque 30
Fukuchilite  pinkish brown, similar bornite Opaque
Fuloppite # bronzy white moderate in blue-green to red-brown Opaque 32
Furutobeite  creamy yellow tint moderate, from light yellow to dark brown weak Opaque 32
Gabrielite ! white with red internal reflections none weak none Opaque 16
Galena # white Opaque 32
Galenobismutite # strong Opaque 32
Gallite # low Opaque 32
Gananite  gray Subtranslucent to Opaque 12
Gaotaiite  bright white with bluish tint not noticable weak with bluish or yellowish tint not noticable Opaque 8
Garavellite  gray with olive-brown tint strong, in yellowish green to bluish distinct Opaque
Gaudefroyite  gray with strong yellow-orange to reddish internal reflections strong in pale grays Subopaque 32
Geerite  bluish white moderate, in yellow weak Opaque
Geffroyite  brown with a creamy tint Opaque 30
Geikielite # gray with red internal reflections strong, purplish red Translucent to opaque 32
Genkinite  pale brown or tan with a yellowish tinge moderate to strong, from gray to extinction weak in oil for some grains Opaque 32
Geocronite # pure white moderate weak Opaque 32
Germanite # pinkish gray Opaque 32
Gersdorffite # white Opaque 32
Getchellite  Dark blood red, tarnishing to green to purple iridescence. weak Nearly opaque 32
Geversite  light gray Opaque 32
Giraudite  light gray with a creamy tint Opaque 30
Glaucodot # distinct, less strong than arsenopyrite less distinct than arsenopyrite Opaque 32
Godlevskite  pale yellow strong, from bluish to reddish weak, pale cream to pinkish cream Opaque 32
Goethite # gray with bluish tint with yellow, red, brown internal reflections distinct in bluish grays Subtranslucent to opaque 32
Gold # gold-yellow when pure, silver white to copper-red when impure, blue and green in transmitted light Opaque 32
Gortdrumite  strong, with colors from grayish white with a bluish tint to blue Opaque 32
Gramaccioliite-(Y) ! weak Opaque 16
Graphite # extreme strong, red Opaque 32
Gratonite # white, distinctly yellow against galena very weak Opaque 32
Grechishchevite  gray wihte with strong internal orange reflections Transparent 14
Greenockite # very light lemon yellow to red-browns and blood red weak Opaque to translucent 32
Greigite  pale creamy white Opaque 32
Grumiplucite ! creamy white low distinct Opaque 16
Gruzdevite  white weak Opaque
Guanajuatite # white with a yellowish hue strong distinct Opaque 32
Gudmundite # silver white to steel-gray strong, in yellow and red tints distinct, in pure white and pinkish white Opaque 32
Guettardite  white with reddish internal reflections relatively strong Opaque 8
Gupeiite  grayish white with a yellow tint Opaque 18
Gustavite  white to grayish white weak in air, distinct in oil, bluish black to grayish white white to gray Opaque
Haapalaite  brown very strong, bronze-red to grayish white distinct, light brown to grayish brown Opaque
Haggite  yellowish gray to dark gray very strong; yellowish gray to bluish gray Opaque 28
Hakite  creamy white to clear brown Opaque 32
Hammarite # steel gray with a red tint Opaque 32
Hanawaltite  gray, may have red-orange internal reflections moderate to strong bright metallic blue weak, bright bluish gray to grayish white Opaque to translucent 32
Hapkeite ! yellowish white none none none Opaque 8
Hastite ? strong strong, especially in oil Opaque 32
Hatchite # dark red in transmitted light Opaque to subtranslucent
Hauchecornite # distinct very weak in air, more distinct in oil Opaque 32
Hauerite # grayish white with a very light brownish hue with red internal reflections Opaque 32
Hausmannite # gray, with deep blood red to reddish brown internal reflections weak distinct Opaque 32
Hawthorneite  light gray weak to moderate weak to moderate, in browns and grays Opaque 32
Haycockite  weak to moderate Opaque 32
Heazlewoodite # cream, yellowish strong, brown to bluish gray Opaque 32
Hedleyite # white, between galena and silver slight, light gray to dark gray Opaque 32
Heideite  creamy white moderately strong, from purple-gray to cream-gray Opaque
Hematite # white to gray white, with a bluish tint, with deep blood-red internal reflections Subtranslucent to opaque 32
Hemloite  gray very weak, dark gray to dark brown Opaque 32
Hemusite  violet-gray to ash gray Opaque 8
Henryite  pale blue Opaque 32
Henrymeyerite ! grayish brown weak, brownish Opaque 8
Herzenbergite # white, with internal reflections in dark red-brown intense in oil, with yellow to red colors very low, light to darker blue-white Opaque 32
Hessite # distinct, dark orange to dark blue Opaque 32
Hetaerolite # strong Subtranslucent to opaque 32
Heterogenite-2H  white with a brownish tinge very strong strong, bluish to yellowish white, browns Opaque 32
Heterogenite-3R # white with a brownish tinge very strong strong, bluish to yellowish white, browns Opaque 32
Hexaferrum ! white none weak Opaque 8
Heyrovskyite  creamy white moderate, gray to red brown not apparent Opaque 38
Hiarneite ! colorless to gray weak Translucent 8
Hocartite  brownish gray distinct, orange to greenish weak, gray-brown to violet gray Opaque 32
Hodrushite  creamy with very slight pinkish tint very feeble, in grays very weak Opaque 32
Hollandite # white strong weak Opaque 32
Hollingworthite  medium gray, slightly bluish in oil Opaque 30
Hongquiite * white with pinkish tint and red internal reflections Opaque 8
Hongshiite * bright white with a slight brownish tint weak to moderate, dull gray to dull reddish brown Opaque 6
Horsfordite ? slightly cream colored to silver-blue and grayish white Opaque
Howardevansite  medium gray moderate Opaque to translucent 8
Hubnerite # white to gray with deep blood red internal reflections distinct Transparent to Translucent 32
Hypercinnabar  grayish white distinct in oil
Idaite # coppery red to pinchbeck brown strong, reddish orange to reddish brown Opaque 32
Ikunolite  white with faint creamy tint nearly isotropic in basal section, moderately anisotropic, pale gray to gray, in diagonal section Opaque 32
Ilmenite # gray, brownish tinted strong strong in shades of gray Opaque 32
Ilmenorutile # pale creamy white weak strong Opaque
IMA2000-016 ! blue-gray noted Opaque 8
Imhofite  white, inclining to cream colored compared to galena, with strong bright red internal reflections very strong Translucent
Imiterite  white-gray strong, from blue to reddish brown bluish to pinkish Opaque 30