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Ekanite, ThCa2Si8O20, Botro ai Marmi, Campiglia Marittima, Campigliese, Livorno Province, Tuscany, Italy. Dark green, dipyramidal ekanite crystal, up to 6 mm in size, with pyrrhotite and diopside. Uploaded by: Cristian Biagioni

Ekanite, ThCa2Si8O20, Botro ai Marmi, Campiglia Marittima, Campigliese, Livorno Province, Tuscany, Italy. Dark green, dipyramidal ekanite crystal, up to 6 mm in size, with pyrrhotite and diopside. Uploaded by: Cristian Biagioni

Clintonite, Ca(Mg,Al)3(Al3Si)O10(OH)2, Camonica Valley, Brescia Province, Lombardy, Italy. Clintonite crystals (var. xanthofillite) to 4mm in length.  Copyright: © Simone Boscolo

Clintonite, Ca(Mg,Al)3(Al3Si)O10(OH)2, Camonica Valley, Brescia Province, Lombardy, Italy. Clintonite crystals (var. xanthofillite) to 4mm in length. Copyright: © Simone Boscolo

Stilpnomelane, (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O, Mont Chemin, Martigny, Valais, Switzerland

Stilpnomelane, (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O, Mont Chemin, Martigny, Valais, Switzerland

Mahlmoodite. Kerriack Cove, St Agnes dist., Cornwall, England, UK Taille=0.75 mm

Mahlmoodite. Kerriack Cove, St Agnes dist., Cornwall, England, UK Taille=0.75 mm

Ekanite, 	ThCa2Si8O20

Ekanite, ThCa2Si8O20

Makatite, Na2Si4O8(OH)2•4(H2O), with Tuperssuatsiaite, Aris, Windhoek, Windhoek District, Khomas Region, Namibia. Fov 7.2 mm. Copyright:	Enrico Bonacina

Makatite, Na2Si4O8(OH)2•4(H2O), with Tuperssuatsiaite, Aris, Windhoek, Windhoek District, Khomas Region, Namibia. Fov 7.2 mm. Copyright: Enrico Bonacina

Clintonite, Ca(Mg,Al)3(Al3Si)O10(OH)2, Lago della Vacca, Cornone di Blumone, Breno, Adamello-Brenta Natural Park, Camonica Valley, Brescia Province, Lombardy, Italy. Dimension crystal mm. 2,4. Variety: Xantophillite. Copyright: © luigi chiappino

Clintonite, Ca(Mg,Al)3(Al3Si)O10(OH)2, Lago della Vacca, Cornone di Blumone, Breno, Adamello-Brenta Natural Park, Camonica Valley, Brescia Province, Lombardy, Italy. Dimension crystal mm. 2,4. Variety: Xantophillite. Copyright: © luigi chiappino

Vertumnite, Ca8Al4(Al4Si5)O12[(OH)36•10(H2O), Caspar Quarry, Bellerberg, Ettringen, Eifel, Rhineland-Palatinate, Germany. Fraction of a lime xenolite with small, transparent, hexagonal-tabular crystals of vertumnite. Fov 1.6 mm. Copyright: © Volker Betz

Vertumnite, Ca8Al4(Al4Si5)O12[(OH)36•10(H2O), Caspar Quarry, Bellerberg, Ettringen, Eifel, Rhineland-Palatinate, Germany. Fraction of a lime xenolite with small, transparent, hexagonal-tabular crystals of vertumnite. Fov 1.6 mm. Copyright: © Volker Betz

Dzhalindite, In(OH) 3, Dzhalinda Sn Deposit, Malyi Khingan Range, Khabarovskiy Kray, Far-Eastern Region, Russia. Copyright © Roberto Bosi

Dzhalindite, In(OH) 3, Dzhalinda Sn Deposit, Malyi Khingan Range, Khabarovskiy Kray, Far-Eastern Region, Russia. Copyright © Roberto Bosi

6.4 Offretite (Hydrated Calcium Potassium Magnesium Aluminum Silicate)

6.4 Offretite (Hydrated Calcium Potassium Magnesium Aluminum Silicate)

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