Mineral Specimen Images (O)

Mineral Specimen Images (O)
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Mineral Specimen Images (O) With 142 Images

Olsacherite Image

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Olsacherite: Pb2(SeO4)(SO4)

Comments: Light yellow crystals of olsacherite up to 2 mm in matrix.
Location: Colquechaca, Potosí, Bolivia. Scale: Picture size 1.5 cm.
© John Veevaert

Olsacherite Image

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Olsacherite: Pb2(SeO4)(SO4)

Comments: Light yellow crystals of olsacherite up to 2 mm in matrix.
Location: Colquechaca, Potosí, Bolivia. Scale: Picture size 1.5 cm.
© John Veevaert

Olshanskyite Image

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Olshanskyite: Ca2[B3O3(OH)6]OH·3(H2O)  
Henmilite: Ca2Cu[B(OH)4]2(OH)4

Comments: Milky white olshanskyite hosting crystals of deep blue henmilite to 6 mm across.
Location: Fuka Mine, Bicchu Town, Kawakama Co., Okayama Pref., Japan. Scale: Crystal size 6 mm.
© John Veevaert

Olshanskyite Image

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Olshanskyite: Ca2[B3O3(OH)6]OH·3(H2O)  
Henmilite: Ca2Cu[B(OH)4]2(OH)4

Comments: Milky white olshanskyite hosting crystals of deep blue henmilite to 6 mm across.
Location: Fuka Mine, Bicchu Town, Kawakama Co., Okayama Pref., Japan. Scale: Crystal size 6 mm.
© John Veevaert

Ominelite Image

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Ominelite: (Fe++,Mg)Al3BSiO9

Comments: Photomicrograph of thin-section (plain light) of zoned ominelite (omn) with quartz (qtz) and plagioclase (pl) in alkali feldspar. (AmMin 87:163).
Location: Misen River in Tenkawa, Yoshino, Nara Prefecture, Japan. Scale: Grain size 0.6 mm.
© American Mineralogist

Ominelite Image

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Ominelite: (Fe++,Mg)Al3BSiO9

Comments: Photomicrograph of thin-section (plain light) of zoned ominelite (omn) with quartz (qtz) and plagioclase (pl) in alkali feldspar. (AmMin 87:163).
Location: Misen River in Tenkawa, Yoshino, Nara Prefecture, Japan. Scale: Grain size 0.6 mm.
© American Mineralogist

Omphacite Image

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Omphacite: (Ca,Na)(Mg,Fe++,Al)Si2O6

Comments: Dark green crystalline omphacite with glaucophane.
Location: Healdsburg, Sonoma County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Omphacite Image

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Omphacite: (Ca,Na)(Mg,Fe++,Al)Si2O6

Comments: Dark green crystalline omphacite with glaucophane.
Location: Healdsburg, Sonoma County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Oneillite Image

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Oneillite: Na15Ca3Mn3Fe++3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2

Comments: Brownish-yellow grains of oneillite in white K-feldspar from the type locality.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville, Montérégie, Québec, Canada. Scale: FOV is 6x5 mm.
© Pavel M. Kartashov

Oneillite Image

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Oneillite: Na15Ca3Mn3Fe++3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2

Comments: Brownish-yellow grains of oneillite in white K-feldspar from the type locality.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville, Montérégie, Québec, Canada. Scale: FOV is 6x5 mm.
© Pavel M. Kartashov

Onoratoite Image

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Onoratoite: Sb8O11Cl2

Comments: White crystals of onoratoite with a yellow crystal of sulphur.
Location: Cetine di Cotorniano Mine (Cetine Mine; Tafone Mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Onoratoite Image

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Onoratoite: Sb8O11Cl2

Comments: White crystals of onoratoite with a yellow crystal of sulphur.
Location: Cetine di Cotorniano Mine (Cetine Mine; Tafone Mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Oosterboschite Image

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Oosterboschite: (Pd,Cu)7Se3

Comments: Polished section showing oosterboschite (metallic yellow) and its alteration product (light brown) as intergranular veinlets surrounding mineralized malachite and quartz (dark grey), and several grains of goethite (light grey).
Location: Copper Hills in the East Pilbara region of Western Australia. (CanMin, v 40:419). Scale: Picture Size 0.56 mm.
© Canadian Mineralogist

Oosterboschite Image

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Oosterboschite: (Pd,Cu)7Se3

Comments: Polished section showing oosterboschite (metallic yellow) and its alteration product (light brown) as intergranular veinlets surrounding mineralized malachite and quartz (dark grey), and several grains of goethite (light grey).
Location: Copper Hills in the East Pilbara region of Western Australia. (CanMin, v 40:419). Scale: Picture Size 0.56 mm.
© Canadian Mineralogist

Opal Image

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Opal: SiO2·n(H2O)

Comments: Section of fossilized tree limb that is now completely replaced by black opal.
Location: Virgin Valley District, Humboldt Co., Nevada, USA. Scale: 20x13x11 mm.
© John Betts - Fine Minerals

Opal Image

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Opal: SiO2·n(H2O)

Comments: Colorful white opal on a sandstone matrix.
Location: Queensland, Australia. Scale: 9 x 6 x 3 cm.
© Isaias Casanova / IC Minerals

Opal Image

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Opal: SiO2·n(H2O)  
Todorokite: (Na,Ca,K)2(Mn++++,Mn+++)6O12·3-4.5(H2O)

Comments: Dendritic todorokite in white opal.
Location: Brosso Mine, Ivrea, Torino, Piemonte, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Opal Image

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Opal: SiO2·n(H2O)

Comments: Section of fossilized tree limb that is now completely replaced by black opal.
Location: Virgin Valley District, Humboldt Co., Nevada, USA. Scale: 20x13x11 mm.
© John Betts - Fine Minerals

Opal Image

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Opal: SiO2·n(H2O)  
Todorokite: (Na,Ca,K)2(Mn++++,Mn+++)6O12·3-4.5(H2O)

Comments: Dendritic todorokite in white opal.
Location: Brosso Mine, Ivrea, Torino, Piemonte, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Opal Image

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Opal: SiO2·n(H2O)

Comments: Colorful white opal on a sandstone matrix.
Location: Queensland, Australia. Scale: 9 x 6 x 3 cm.
© Isaias Casanova / IC Minerals
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