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Macdonaldite, BaCa4[Si16O36(OH)2]•10(H2O), Rush Creek, Fresno County, California, USA. Source: Michael Scott. Radiating aggregates of white platy crystals

Macdonaldite, BaCa4[Si16O36(OH)2]•10(H2O), Rush Creek, Fresno County, California, USA. Source: Michael Scott. Radiating aggregates of white platy crystals

Cobaltlotharmeyerite,  	Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2, on quartz, Roter Berg Mine, Schneeberg, Erzgeb., Saxony, Germany. Fov 3 mm Collection/Copyight: 	chribiedav. Tsumcorite group

Cobaltlotharmeyerite, Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2, on quartz, Roter Berg Mine, Schneeberg, Erzgeb., Saxony, Germany. Fov 3 mm Collection/Copyight: chribiedav. Tsumcorite group

Lemoynite, (Na,K)2CaZr2Si10O26•5-6(H2O), Wind Mountain, Cornudas Mts, Otero Co., New Mexico, USA. Fov .8 mm. The white ball has been identified as possible lemoynite. Associated with green aegirine and white microcline. Uploaded by: Jerry Cone

Lemoynite, (Na,K)2CaZr2Si10O26•5-6(H2O), Wind Mountain, Cornudas Mts, Otero Co., New Mexico, USA. Fov .8 mm. The white ball has been identified as possible lemoynite. Associated with green aegirine and white microcline. Uploaded by: Jerry Cone

Rhodesite, KHCa2Si8O19•5(H2O), near Trinity Lake, Trinity Co., California, USA. White acicular crystals in sprays and crusts to 3mm

Rhodesite, KHCa2Si8O19•5(H2O), near Trinity Lake, Trinity Co., California, USA. White acicular crystals in sprays and crusts to 3mm

Chrysotile, Mg3Si2O5(OH)4, Aufgelassener quarry, Badersdorf, Bez. Oberwart, Burgenland, Austria. Copyright:	oliverOliver

Chrysotile, Mg3Si2O5(OH)4, Aufgelassener quarry, Badersdorf, Bez. Oberwart, Burgenland, Austria. Copyright: oliverOliver

Chrysotile, Mg3Si2O5(OH)4, Caerleon Cove, Ruan Minor, Grade-Ruan, Lizard Peninsula, Cornwall, England, UK. Fov 6 mm. Coarse grained chrysotile. Copyright: © J.I.G.R.

Chrysotile, Mg3Si2O5(OH)4, Caerleon Cove, Ruan Minor, Grade-Ruan, Lizard Peninsula, Cornwall, England, UK. Fov 6 mm. Coarse grained chrysotile. Copyright: © J.I.G.R.

Naujakasite, Na6(Fe++,Mn)Al4Si8O26, Naujakasik, Tunulliarfik Fjord, Ilímaussaq complex, Narsaq, Kujalleq, Greenland. Fov 1.7 mm. Pale grayish green diamond shaped faces of naujakasite on matrix. Copyright: © 2017 by Jesse Crawford

Naujakasite, Na6(Fe++,Mn)Al4Si8O26, Naujakasik, Tunulliarfik Fjord, Ilímaussaq complex, Narsaq, Kujalleq, Greenland. Fov 1.7 mm. Pale grayish green diamond shaped faces of naujakasite on matrix. Copyright: © 2017 by Jesse Crawford

Chrysotile, Mg3Si2O5(OH)4, Brosso Mine, Cálea, Léssolo, Canavese District, Torino Province, Piedmont, Italy. Fov 3 mm. Collection and Photo Bruno Marello

Chrysotile, Mg3Si2O5(OH)4, Brosso Mine, Cálea, Léssolo, Canavese District, Torino Province, Piedmont, Italy. Fov 3 mm. Collection and Photo Bruno Marello

Macdonaldite, BaCa4[Si16O36(OH)2]•10(H2O), Big Creek, Fresno County, California, USA. White to colorless acicular radiating macdonaldite crystals on witherite matrix from the type locality

Macdonaldite, BaCa4[Si16O36(OH)2]•10(H2O), Big Creek, Fresno County, California, USA. White to colorless acicular radiating macdonaldite crystals on witherite matrix from the type locality

Rhodesite, KHCa2Si8O19•5(H2O), Stradner Kogel Quarry, Wilhelmsdorf, Styria, Austria. White sprays of rare silicate species rhodesite on quartz bearing chalk xenolite matrix. Associating minerals are phillipsite and amphibole

Rhodesite, KHCa2Si8O19•5(H2O), Stradner Kogel Quarry, Wilhelmsdorf, Styria, Austria. White sprays of rare silicate species rhodesite on quartz bearing chalk xenolite matrix. Associating minerals are phillipsite and amphibole

Tobermorite, Ca5Si6O16(OH)2•4(H2O), Buer, Bjørkedalen, Porsgrunn, Telemark, Norway. A group of beige, fibrous torbermorite crystals in vuggy feldspar. Fov about 4 mm. Copyright: © OT. Ljostad 2005

Tobermorite, Ca5Si6O16(OH)2•4(H2O), Buer, Bjørkedalen, Porsgrunn, Telemark, Norway. A group of beige, fibrous torbermorite crystals in vuggy feldspar. Fov about 4 mm. Copyright: © OT. Ljostad 2005

Varennesite, Na8Mn++2Si10O25(OH,Cl)2•12(H2O), Magadiite,  Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada. Varennesite crystal 5 mm across sprinkled with tiny spherules of magadiite. Copyright: © László Horváth

Varennesite, Na8Mn++2Si10O25(OH,Cl)2•12(H2O), Magadiite, Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada. Varennesite crystal 5 mm across sprinkled with tiny spherules of magadiite. Copyright: © László Horváth

Varennesite, Na8Mn++2Si10O25(OH,Cl)2•12(H2O), Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada. Fov 7.0 x 4.3 mm. MOB coll. Varennesite colors range from pale mustard yellow to brick red to dark brown (and can change with time).

Varennesite, Na8Mn++2Si10O25(OH,Cl)2•12(H2O), Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada. Fov 7.0 x 4.3 mm. MOB coll. Varennesite colors range from pale mustard yellow to brick red to dark brown (and can change with time).

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