Miharaite
Formula Cu4FePbBiS6 From Alfredo Petrov: Below: Miharaite, Mihara mine, Higashi-Mihara, Ibara City, Okayama Prefecture, Japan. Width of view 7mm.
Azurite
Formula: Cu3(CO3)2(OH)2 From Alfredo Petrov: Below: Azurite, Malachite, “Kozu Mine, Okayama Prefecture”, Japan. Probably more likely to be the Dohgamaru Mine (道川鉱山), located within the Kozu River basin in Masuda City, Shimane Prefecture, Japan. See Mineral Matters post for the detailed explanation. Size 65x30x30mm.
Gold
Formula: Au Summary extracted from Alfredo Petrov’s Encyclopedia: Summary of Occurrence The Encyclopedia does not contain a dedicated entry for Native Gold. However, information about its occurrence can be compiled from mentions within the descriptions of other minerals. Based on this data, native gold and its natural alloy, electrum, are...
Nakauriite
Formula: Cu8(SO4)4(CO3)(OH)6 · 48H2O From Alfredo Petrov: Above: Nakauriite, Nakauri mine, Shinshiro city, Aichi Prefecture, Japan. Width of view 6mm.
Gadolinite-(Y)
Formula: Y2Fe2+Be2Si2O10 From Alfredo Petrov: Above: Gadolinite-(Y), Miyazuma-kyo, Mie Prefecture, Japan. Width of view 17.25mm.
Hemusite
Formula: Cu1+4Cu2+2SnMoS8 From Alfredo Petrov: Above: Hemusite, Kawazu mine (Rendaiji mine, Rendaizi mine), Rendaiji, Shimoda City, Shizuoka Prefecture, Japan. Width of view 6mm.
Corundum
Formula: Al2O3 From Alfredo Petrov: Above: About 20 1mm gem blue zoned sapphires from a placer deposit. Anamushi alluvials, Kashiba City, Nara Prefecture, Japan.
Henmilite
Formula: Ca2Cu[B(OH)4]2(OH)4 Henmilite is a rare blue calcium copper borate and was named after Professor Kitinosuke Henmi, and his daughter, Dr. Chiyoko Henmi form Okayama University. The Fuka Mine is the Type Locality, and in fact, is the only locality where henmilite has been found. From Alfredo Petrov: Above: Henmilite,...
Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96·28H2O From Alfredo Petrov: Above: Mordenite, Sotoura, Hatamachi, Shizuoka Prefecture, Japan. Flat lying acicular white sprays. Ex Allan and Elvire Mortimer. Ex I. Sunagawa. Measures 49x37x20mm.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2 From Alfredo Petrov: Above: “Cerasite”: Muscovite, cordierite, indialite, Daimonjiyama, Kyoto City, Kyoto Prefecture, Japan. Acquired by Jake Slago from Alfredo Petrov at the 2013 Tucson Show. Rocks and Minerals magazine Jul-Aug 2006: The third sentence in this nine page article reads: As with the real blossoms, these stones,...
Pyroxmangite
Formula: Mn2+SiO3 From Alfredo Petrov: PYROXMANGITE (pairokusumangan-koh; pairokusumangan-seki)(Fairly widespread in japanese metamorphosed bedded Mn deposits, where it is often very low in Fe and much closer to end-member composition than other world pyroxmangites. Previously often mistaken for rhodonite.) Above: Pyroxmangite, Taguchi mine, Shitara, Kitashitara County, Aichi Prefecture, Japan. Width of...
Dachiardite-Ca
Formula: (Ca,Na2,K2)5Al10Si38O96·25H2O From Alfredo Petrov: DACHIARDITE-Ca (kai-dakiarudi-fusseki) Above: Dachiardite-Ca, Hokiya-dake, Toyosaka, Matsushiro, Nagano City, Nagano Prefecture, Japan. Width of view 6mm. Labelled as Mt Hokidoke, Nagono Volcano, Japan. Colourless prismatic crystals.