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Saponite: (Ca/2,Na)0,3(Mg,Fe++)3(Si,Al)4O10(OH)2·4(H2O)

Comments: Light brown saponite pseudomorphs after stilbite crystals up to 6 mm.
Location: Thetford Mines, Mégantic Co., Québec, Canada. Scale: 25x25x12 mm.
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Sapphirine: (Mg,Al)8(Al,Si)6O20

Comments: Large complex crystalline cluster of dark blue to black sapphirine.
Location: Betroka district, Toliara (Tuléar) Province, Madagascar. Scale: 15x14x10 mm.
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Sellaite: MgF2

Comments: Compact, white acicular sellaite crystals.
Location: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany. Scale: 21x16x10 mm.
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Smithsonite: ZnCO3  
Murdochite: PbCu6O8-x(Cl,Br)2x

Comments: Dark metallic micro crystals of murdochite on pale blue-gray smithsonite crystal covered matrix.
Location: Silver Hill Mine group, Silver Hill, Waterman District, Waterman Mts, Pima Co., Arizona, USA. Scale: 5x4x2 cm.
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Staurolite: (Fe++,Mg)2Al9(Si,Al)4O20(O,OH)4

Comments: Cruciform twinned staurolite crystals without matrix.
Location: Marble, Cherokee Co., North Carolina, USA. Scale: 3x2.5x1.5 cm.
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Stellerite: CaAl2Si7O18·7(H2O)

Comments: Hemispherical crystal cluster 35 mm diameter of white stellerite crystals in a pocket lined with drusy quartz.
Location: Pune (Poonah), Maharashtra, India. Scale: 13x7x5 cm.
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Stichtite: Mg6Cr2(CO3)(OH)16·4(H2O)

Comments: Massive, fibrous, lavender-purple stichtite.
Location: Kaapsche Hoop, Barberton District, Mpumalanga Province, South Africa. Scale: 5x3x2 cm.
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Strontianite: SrCO3

Comments: Lustrous, white strontianite crystals covering all sides of matrix. The strontianite fluoresces bright blue-white under UV illumination.
Location: Lime City Quarry, Lime City, Wood Co., Ohio, USA. Scale: 6x5x4 cm.
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Sweetite: Zn(OH)2

Comments: A white, pseudocubic crystal of sweetite.
Location: Milltown Quarry, Ashover, Derbyshire, England, UK. Scale: Picture size 1.4 mm.
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Thorite: ThSiO4

Comments: Brown crude crystal of thorite var. uranothorite with still visible termination on both ends. Mildly radioactive.
Location: Kemp Uranium Mine, Cheddar, Cardiff Township, Haliburton Co., Ontario, Canada. Scale: 15x14x13 mm.
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Tincalconite: Na6[B4O5(OH)4]3·8(H2O)

Comments: Pristine white tincalconite pseudomorph after a single borax crystal.
Location: Boron, Kramer District, Kern Co., California, USA. Scale: 30x14x5 mm.
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Torbernite: Cu(UO2)2(PO4)2·8-12(H2O)

Comments: Cluster of green torbernite crystals. Radioactive.
Location: Margabal Mine, Entraygues-sur-Truyère, Aveyron, Midi-Pyrénées, France. Scale: 22x13x10 mm.
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Tremolite: [ ]Ca2Mg5Si8O22(OH)2

Comments: Dark green tremolite crystal cluster.
Location: Selleck Road Locality, West Pierrepont, St Lawrence Co., New York, USA. Scale: 4.5x2x1.5 cm.
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Uranmicrolite: (U,Ca)2(Ta,Nb)2O6(OH)

Comments: lack crystals of (most probably) uranmicrolite [originallly labeled samarskite-(Y)) in purple lepidolite matrix.
Location: Brown Derby Mine, Ohio City, Quartz Creek District, Gunnison Co., Colorado, USA. Scale: Specimen Side 3x3x2 cm.
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Villiaumite: NaF  
Aplowite: (Co,Mn,Ni)SO4·4(H2O)

Comments: Pink aplowite laths intergrown with lustrous, red, massive villiaumite.
Location: Mt Rasvumchorr, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: 20x19x18 mm.
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Vitusite-(Ce): Na3(Ce,La,Nd)(PO4)2  
Magnesio-arfvedsonite: NaNa2(Mg4Fe++)Si8O22(OH)2

Comments: Translucent beige-colored vitusite-(Ce) in a rim around a black magnesio-arfvedsonite crystal.
Location: Yubileinaya Vein, Karnasurt Mountain, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Russia. Scale: Specimen Size 4x3x3 cm.
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Vlasovite: Na2ZrSi4O11  
Eudialyte: Na4(Ca,Ce)2(Fe++,Mn,Y)ZrSi8O22(OH,Cl)2 (?)

Comments: Transparent yellow-gray vlasovite crystal frozen in pink eudialyte matrix.
Location: Kipawa alkaline complex, near Sheffield Lake, Villedieu Township, Témiscamingue Co., Québec, Canada. Scale: 2x2x1 cm.
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Wardite: NaAl3(PO4)2(OH)4·2(H2O)  
Crandallite: CaAl3(PO4)2(OH)5·(H2O)

Comments: Sliced and polished slab of yellow to white mixture of wardite and crandallite.
Location: Clay Canyon, Fairfield, Utah Co., Utah, USA. Scale: 11x6x.6 cm.
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Wohlerite: NaCa2(Zr,Nb)Si2O7(O,OH,F)2  
Ferro-edenite: NaCa2Fe++5Si7AlO22(OH)2

Comments: Transparent yellow wöhlerite crystals embedded in pink feldspar and black mica matrix with black ferro-edenite (var. barkevikite).
Location: Langesundsfjorden, Sandoya Island, Porsgrunn, Norway. Scale: Specimen Size: 5x5x3.5 cm.
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Zoisite: Ca2Al3(SiO4)3(OH) = Ca2AlAl2(SiO4)(Si2O7)O(OH)

Comments: Dual views of a large crystal of blue-violet zoisite (var. tanzanite) showing the pleochroism.
Location: Merelani Hills, Umba Valley, Lelatema Mts., Arusha Region, Tanzania. Scale: 35 mm 42.32 ct.
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