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Clinochlore: (Mg,Fe++)5Al(Si3Al)O10(OH)8  
Andradite: Ca3Fe+++2(SiO4)3

Comments: Transparent topazolite, the yellow variety of andradite on clinochlore.
Location: Yellow Cat Mine, New Idria District, San Benito County. California, USA. Scale: 2.7 x 2.5 cm.
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Clinochlore: (Mg,Fe++)5Al(Si3Al)O10(OH)8  
Perovskite: CaTiO3

Comments: Square, opaque perovskite on green clinochlore. Very brilliant and with large crystals (2 x 1.5 cm.).
Location: Ilmen Mountains. Chelyabinsk, Urals, Russia. Scale: 6 x 4.5 cm.
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Clinozoisite: Ca2Al3(SiO4)3(OH) = Ca2AlAl2(SiO4)(Si2O7)O(OH)

Comments: Brown, prismatic crystal of clinozoisite.
Location: Alchuri, Shigar Skardu district, Pakistan. Scale: Crystal size 7x2.3x1.2 cm.
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Colemanite: Ca2B6O11·5(H2O)

Comments: Large crystals of brown colemanite with second generation of absolutely clear and gemmy (colorless) colemanite. Intensely fluorescent in long and short UV..
Location: Mustafakemalpascha Mine, West-Anatolia Turkey. Scale: Crystal size: 1.3 x 1 cm.
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Columbite-(Fe): Fe++Nb2O6  
Microcline: KAlSi3O8

Comments: Blocky, dark brown ferrocolumbite on pale greenish blue amazonite (microcline).
Location: Crystal Park, El Paso Co., Colorado, USA. Scale: 2.5 x 1.5 cm.
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Cornetite: Cu3(PO4)(OH)3

Comments: Radial groups of intense blue cornetite crystals in green malachite.
Location: Mine de l'Etoile, Shaba, Lubumbashi Zaire. Scale: Picture size 5 cm.
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Corundum: Al2O3

Comments: corundum (variety Sapphire).
Location: Miass, Urals, Russia. Scale: 10 x 8 cm.
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Covellite: CuS

Comments: Covellite crystal group.
Location: Butte, Montana, USA. Scale: 8 x 4 cm.
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Creedite: Ca3Al2(SO4)(F,OH)10·2(H2O)  
Fluorite: CaF2

Comments: Well-developed, prismatic, reddish creedite crystals on green fluorite.
Location: Mina Navidad, Rodeo, Durango, Mexico. Scale: 9 x 5 x 5.3 cm.
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Cuprite: Cu2O  
Chrysocolla: (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Comments: Semi-metallic, dark reddish gray, cuprite crystals on blue chrysocolla.
Location: Mashamba West mine, Shaba, Congo. Scale: 7.5 x 4.7 x 2.3 cm.
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Datolite: CaBSiO4(OH)

Comments: Cluster of doubly-terminated datolite crystals to 3.3 cm across with a scattering of brown inclusions.
Location: Boron Pit, Dal'Negorsk, Russia. Scale: 5x3.9x3.7 cm.
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Descloizite: PbZn(VO4)(OH)

Comments: Dark reddish brown, crystalline aggregate of descloizite.
Location: Grootfontein. Namibia. Scale: 3 cm.
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Devilline: CaCu4(SO4)2(OH)6·3(H2O)

Comments: Laminar crystals of blue devilline on matrix..
Location: Spania Dolina (ex-Herrengrund) Banská Bystrica Slovak Republic. Scale: Specimen size: 6.9 x 3.3 x 5.7 cm.
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Diopside: CaMgSi2O6  
Magnesioferrite: MgFe+++2O4

Comments: Very dark brown Magnesioferrite Pleonaste (Iron-Magnesium spinel) with cream colored Calcite and gray green diopside.
Location: Aldan, Gon River, Russia. Scale: 6 x 4.5 cm.
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Dissakisite-(Ce): Ca(Ce,REE)(Mg,Fe++)(Al,Fe+++)2Si3O12(OH)  
Dolomite: CaMg(CO3)2

Comments: Small, prisimatic, acicular crystals of tan-colored dissakisite-(Ce) scatterd on white crystalline dolomite.
Location: Trimouns mine, Luzenac, Ariège France. Scale: Picture size 5 cm.
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Djurleite: Cu31S16

Comments: Dark, metallic djurleite with transparent quartz and white calcite.
Location: Dzhezkazgan. Kazakhstan. Scale: 4.5 x 4.5 cm.
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Dolomite: CaMg(CO3)2  
Dissakisite-(Ce): Ca(Ce,REE)(Mg,Fe++)(Al,Fe+++)2Si3O12(OH)

Comments: Small, prisimatic, acicular crystals of tan-colored dissakisite-(Ce) scatterd on white crystalline dolomite.
Location: Trimouns mine, Luzenac, Ariège France. Scale: Picture size 5 cm.
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Doyleite: Al(OH)3  
Gibbsite: Al(OH)3

Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite. Analysis shows that doyleite dominates the mix. There are also minor canary yellow phlogopite crystals.
Location: Baoshan, Yunnan, China. Scale: 8 x 6.5 x 1.9 cm.
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Dravite: NaMg3Al6(BO3)3Si6O18(OH)4

Comments: Doubly terminated dravite crystal on white mica shist matrix.
Location: Yinnietharra Station, Gascoyne, Western Australia. Scale: 4 x 4 x 2.9 cm.
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Duftite-beta: PbCu(AsO4)(OH)

Comments: Intensely green Duftite-beta on fluorescent calcite.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: .
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