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Haycockite: Cu4Fe5S8 Mooihoekite: Cu9Fe9S16
Comments: B&W polished section image of mooihoekite-haycockite intergrowth showing tarnished mooihoekite (mh) and haycockite (hc). The small whitest lamellar grains are mackinawite. Location: Hortonolite dunite (replacement,) pegmatite, Mooihoek Farm, Lydenburg District, Transvaal, South Africa. (AmMin, v57:689). Scale: See Image. © American Mineralogist
Haydeeite: Cu3Mg(OH)6Cl2
Comments: Blue crystalline druze of haydeeite on matrix. Location: Haydee Mine, Iquiqua, Paparaca, Chile. Scale: Specimen Size 2 1/2 in x 2 in. © Chris Wright / Wrights Rock Shop
Haynesite: (UO2)3(SeO3)2(OH)2·5(H2O)
Comments: Yellow tufts of haynesite. Location: Repete mine, San Juan County, Utah, USA. Scale: Crystal size 0.5 mm. © Tom Loomis / Dakota Matrix
Comments: Bright yellow sunburst clusters of haynesite on a fracture surface.. Location: Repete Mine, San Juan Co., Utah, USA. Scale: Picture size 0.5 cm. © Paul M. Schumacher
Heazlewoodite: Ni3S2
Comments: Small crystal aggregate of heazlewoodite. Location: Jeffrey Mine, Asbestos, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Hechtsbergite: Bi2O(OH)(VO4)
Comments: Light brownish crystals of hechtsbergite in matrix. Location: Hechtsberg Quarry, Hausach, Kinzig Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Hectorfloresite: Na9(IO3)(SO4)4
Comments: Prismatic twinned crystal of hectorfloresite. Location: Pampa Rica, Antofagasta, Chile. Scale: Picture size 2 mm. © Thomas Witzke / Abraxas-Verlag
Hectorite: Na0,3(Mg,Li)3Si4O10(OH)2
Comments: Pure white paper-like matted masses of hectorite. Location: near Hector, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Hedenbergite: CaFe++Si2O6
Comments: Thick, bluish gray blocky prisms of hedenbergite on matrix. Location: Harstig mine, Pajsberg, Varmland, Sweden. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Hedenbergite: CaFe++Si2O6 Ilvaite: CaFe++2Fe+++Si2O7O(OH)
Comments: Doubly terminated, black ilvaite on crystals of greenish gray hedenbergite with minor galena. Location: First Sovietsky mine, Dalnjegorsk, Russia. Scale: 4 x 2.8 x 1.8 cm. © Fabre Minerals