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Howieite: Na(Fe++,Mn++)10(Fe,Al)2Si12O31(OH)13
Comments: Black vitreous radiating crystalline howieite. Location: Longvale Quarry, Mendocino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Howlite: Ca2B5SiO9(OH)5
Comments: Silky nodule of howlite. Location: Windsor, Nova Scotia, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Hsianghualite: Ca3Li2Be3(SiO4)3F2
Comments: White crystalline areas of hsianghualite in dark green chloritic schist(?). Location: Xianghualing Mine, Hunan, Central South Region, China. Scale: Not Given. © Tom Loomis / Dakota Matrix
Huanghoite-(Ce): BaCe(CO3)2F Zhonghuacerite-(Ce): Ba2Ce(CO3)3F
Comments: Brown grains of zhonghuacerite-(Ce) in matrix. This type material may be Huanghoite-(Ce). Location: Bayan Obo iron mine, Baotou, Inner Mongolia, China. Scale: Not Given. © Diederik Visser
Huangite: Ca0.5Al3(SO4)2(OH)6
Comments: BSE image of alunite (light gray), natroaluminite (dark gray), minamiite (gray slender zone banded by natroaluminite), and huangite (medium gray). Location: Sulfuric altered andesite, Okumanza, Gunma Prefecture, Japan. Scale: Picture Size 0.31 x 0.24 mm. © Mineralogical Journal
Hubeite: Ca2Mn++Fe+++Si4O12(OH)(H2O)2 Inesite: Ca2Mn7Si10O28(OH)2·5(H2O)
Comments: Brown hubeite aggregates accompanied by prismatic pinkish inesite crystals. Location: Fengjiashan Mine, Daye, Hubei China. Scale: 5.3 x 3.7 x 1.1 cm. © Fabre Minerals
Comments: Translucent, deep root beer brown, platy hueite crystals in fan-like groups to 1mm with delicate pink laths of inesite. Location: Fengjiashan Mine, Daye Co., Huangshi Prefecture, Hubei Province, China. Scale: Picture Size 5 mm. © Tom Loomis / Dakota Matrix
Hubnerite: MnWO4
Comments: Sharp, dark tabular crystals of hübnerite with pyrite. Location: Cavnic, Romania. Scale: Crystal size 2 cm. © John Attard
Huemulite: Na4Mg(V10O28)·24(H2O)
Comments: Brownish orange aggregate of huemulite crystals. Location: Walker mine, Thompson, Grand County, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Hulsite: (Fe++,Mg)2(Fe+++,Sn)O2(BO3)
Comments: Black crystalline granular massive hulsite. Location: Brooks Range, Seward Peninsula, Alaska, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Humberstonite: K3Na7Mg2(SO4)6(NO3)2·6(H2O)
Comments: White powdery aggregate of humberstonite. Location: Oficina Alemanin, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Humboldtine: Fe++(C2O4)·2(H2O)
Comments: Yellow crystals of humboldtine. Location: Lomnice, Sokolov, Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Humite: (Mg,Fe++)7(SiO4)3(F,OH)2
Comments: Striated, brown, tabular crystals of humite. Location: Monte Somma (Vesuvius), Campania, Italy. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Hummerite: KMgV+++++5O14·8(H2O)
Comments: Orange-yellow hummerite on fossil wood. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Specimen size 65 mm. © Thomas Witzke / Abraxas-Verlag
Hunchunite: (Au,Ag)2Pb
Comments: Bluish-gray hunchunite in a polished section in reflected light. Location: Nizhne-Tagil'skoye (Mednorudyanskoye) Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Picture size 0.2 mm. © Thomas Witzke / Abraxas-Verlag
Huntite: CaMg3(CO3)4
Comments: pure white chalky massive huntite. Location: Near Austin, Lander County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Hureaulite: Mn5(PO3OH)2(PO4)2·4(H2O)
Comments: Pink crystals of hureaulite on matrix. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Hureaulite: Mn5(PO3OH)2(PO4)2·4(H2O) Tavorite: LiFe+++(PO4)(OH)
Comments: Lime green tavorite micro crystals with pink, gemmy hureaulite. Location: Tip Top mine, Custer Co., South Dakota, United States. Scale: Picture size 1.0 cm. © Tom Loomis / Dakota Matrix
Hurlbutite: CaBe2(PO4)2 Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)
Comments: White, round crystal clusters of hurlbutite on reddish brown roscherite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Hutchinsonite: (Pb,Tl)2As5S9
Comments: Dark, striated, prismatic crystal of hutchinsonite on matrix. Location: Quiruvica, La Libertad Dept., Peru. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals