Oxides-hydroxides page

Legend: Sizes of specimens in cm. Sizes of crystals in mm. Weight in kg. Prices in euros (consider an exchange rate of 1.35 U.S.A. dollars for 1 euro). Reproduction of text and photos prohibited without permission of author. All the specimens are from Italy if not differently specified.

m130- Valentinite, stibiconite – Min. Le Cetine – Chiusdino – Toscana – Italy. Size 4x3x3 weight 0.1. Cluster of yellow valentinite crystals with max. size 2 mm. with crusts of stibiconite. 11 €

m554- Tenorite – Vesuvio crater - Campania – Italy. Size 3x3x2 weight 0.05. Cluster of black tenorite micro-crystals on lave matrix. 9 €

m050- Ramsdellite – Comerio - Varese – Lombardia - Italy. Size 3x2x1 weight 0.05. Cluster of black metallic ramsdellite micro-crystals. 9 €

	m825- Coesite, ellenbergerite – Martiniana – Valle Po - Piemonte – Italy (Dora-Maira massif). Size 5x4x3 weight 0.1. Colourless coesite nodule of 2 mm. and dark violet ellenbergerite microcrystals on pyrope matrix. Typical sample of high pressure methamorfism. It was formed at 100 km. of depth under the ground’s level. 16 €

m358- Gold, orthobrannerite – Fenillaz lode – Brusson mine – Val d’Ayas – Valle d’Aosta – Italy. Size 3x2x2 weight 0.05. Dendritic gold aggregate of 10 mm. on quartz matrix. The black microcrystals are orthobrannerite. 175 €

m195- Manganite – Ilfeld – Harz – Thuringia - Germany. Size 5x4x3 weight 0.2. Cluster of black brilliant manganite crystals with max. size 5 mm.. Classic specimen now undiscoverable. 75 €

s135- Cryptomelane – Bric Poi – Bricherasio – Piemonte – Italy. Size 5x5x1 weight 0.1. Black-brown bothroidal cryptomelane on marble matrix. 6 €

	m223- Bixbyite – Thomas Range – Juab co. – Utah – U.S.A. (type locality). Size 0.8x0.8x0.8 weight 0.05. Perfect black cubic bixbyite single crystal without matrix.   17 €

p006- Coesite on pyrope – Brossasco – Val Varaita - Piemonte – Italy (Dora-Maira massif). Size 4x3x3 weight 0.1. Colourless coesite nodule of 2 mm. on pyrope matrix. Typical sample of high pressure methamorfism. It was formed at 100 km. of depth under the ground’s level. It is visible the typical radial cracking. 20 €

m231- Cassiterite – Penouta mine – Ourense – Galicia - Spain. Size 4x3x2 weight 0.1. Two black cassiterite crystals of 10 and 5 mm. on matrix. 9 €

m075- Zircon – Bocchetta di Campo - Val Grande – Val d’Ossola - Piemonte - Italy. Size 5x3x3 weight 0.15. Brown zircon crystal of 8 mm. on matrix. 11 €

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