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Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)
Comments: Bluish colliform englishite crystals. Location: Clay Canyon, Fairfield, Utah County, Utah. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O) Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)
Comments: Black crystalline aggregate of roscherite on white englishite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O) Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O) Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)
Comments: Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm. Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Enstatite: Mg2Si2O6
Comments: Single, terminated, brown, transparent to translucent enstatite crystal. Location: Mpwa-Mpwa, Tanzania. Scale: 17x17x27 mm. © Dan Weinrich
Eosphorite: MnAl(PO4)(OH)2·(H2O) Zanazziite: Ca2(Mg,Fe++)(Mg,Fe++,Al,Mn,Fe+++)4Be4(PO4)6(OH)4·6(H2O)
Comments: Minor crystals of equant, olive green zanazziite and brown, lath-like crystals of eosphorite on quartz. Location: Taquaral, Minas Gerais, Brazil. Scale: Picture size 1 cm. © John Veevaert
Eosphorite: MnAl(PO4)(OH)2·(H2O) Vivianite: Fe++3(PO4)2·8(H2O)
Comments: Bottle-green translucent vivianite crystal (2cm) associated with reddish, micro eosphorite crystals. Location: Lavra do Énio pegmatite, Galiléia, Governador Valadares, Rio Doce, Minas Gerais, Brazil. Scale: 3.5 x 3 x 2 cm.. © Tom Loomis / Dakota Matrix
Ephesite: NaLiAl2(Al2Si2)O10(OH)2 Hausmannite: Mn++Mn+++2O4
Comments: Flesh-colored ephesite associated with dark brownish black hausmannite. Location: Gloucester mine. Postmasburg, Cape province. S. Africa. Scale: 5.5 x 5 cm. © Fabre Minerals
Epididymite: NaBeSi3O7(OH)
Comments: Trilling twinned crystal of epididymite on matrix. Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Epididymite: NaBeSi3O7(OH) Eudidymite: NaBeSi3O7(OH)
Comments: Translucent prismatic crystals of eudidymite on white opaque epididymite. Location: Narsaarsuk, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Epidote: Ca2(Fe+++,Al)3(SiO4)3(OH) = Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH)
Comments: Dark green, blocky epidote with transparent quartz. Location: Copper Mt., Prince of Wales, Alaska. Scale: 7 x 5 cm. © Fabre Minerals
Epidote-(Pb): (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH) Clinohedrite: CaZnSiO4·(H2O)
Comments: Clear crystals of clinohedrite on hancockite (epidote-(Pb)). Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Epidote-(Pb): (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH)
Comments: Reddish brown prisms of hancockite on matrix. Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Epidote-(Pb): (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH) Nasonite: Pb6Ca4Si6O21Cl2
Comments: Colorless, transparent hexagonal prism of nasonite on reddish brown hancockite (epidote-(Pb)). Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Epidote-(Sr): CaSrAl2Fe+++(Si2O7)(SiO4)O(OH)
Comments: B&W image of a radial aggregate of epidote-(Sr) in tinzenite. (Journal of Mineralogical and Petrological Sciences, v103:400. Location: Nagakawara and Hohnomori deposits at the Ananai mine, Kochi Prefecture, Japan. Scale: See Image. © Journal of Mineralogical and Petrological Sciences
Epistilbite: CaAl2Si6O16·5(H2O) Quartz: SiO2
Comments: White epistilbite cluster 25 mm across on amethyst quartz crystal matrix. Location: Sawda, Jalgaon, Maharashtra, India. Scale: 10x8x5 cm. © John Betts - Fine Minerals
Epistolite: (Na,[ ])2{(Na,Ti)4[Nb2(O,H2O)4Si4O14](OH,F)2}·2H2O
Comments: Plate-like crystals of pearly white epistolite to 2.7 cm. Location: Ilimaussaq, Kvanefjeld, Greenland. Scale: 3.5 cm. © John Veevaert
Epsomite: MgSO4·7(H2O)
Comments: Pure white compact fibrous mass of epsomite. Location: Calatayud, Zaragoza, Aragon, Spain. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Ercitite: Na2(H2O)4[Mn+++2(OH)2(PO4)2]
Comments: Back-scattered electron images of ercitite (medium gray) showing lath-shaped habit and cleavages and splintering on mechanical disturbance. W: whitlockite, F: fairfieldite, C: unidentified. (CanMin, v 38, p 896). Location: Tanco pegmatite, southeastern Manitoba, Canada. Scale: Image size 150 µ-m. © Canadian Mineralogist
Erdite: NaFeS2·2(H2O)
Comments: Red-brown columnar crystalline erdite in matrix. Location: Coyote Peak, Humboldt County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Ericaite: (Fe++,Mg,Mn)3B7O13Cl
Comments: Cubic crystal ericaite. Location: Bischofferode, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Crystal size 3.7 mm. © Thomas Witzke / Abraxas-Verlag