Search Archived Mineral Specimens

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Locality

South Terris mine, St. Stephen-in-Brannel, Cornwall, England

Formula

Ni₃(AsO₄)₂

Size

Thumbnail .7x.3x.3cm

Tagged

arsenate

Special Info

Type Locality

Special Info

Neotype Specimen

The specimen is from the neotype specimen and consist of yellow pulverulent Xanthiosite and grass green Aerugite, both minerals are extremely rare. This is an reported locality from the collection of Dr. Mark Feinglos. Mark obtained the specimen from the British Museum.

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Locality

Imiter mine, Tinghir Prov., Drâa-Tafilalet, Morocco

Formula

Ag₃AsS₃

Size

SmCabinet 6.5x5x5cm

Tagged

sulfide , silver

Exceptional orange micro crystals of Xanthoconite to 1mm with rich coverage associated with surperb prismatic crystals of Proustite to 3mm. 

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Locality

Imiter mine, Tinghir Prov., Drâa-Tafilalet, Morocco

Formula

Ag₃AsS₃

Size

Miniature 4x3.2x3cm

Tagged

sulfide , silver

Incredible specimen with numerous orange crystals of Xanthoconite to 1mm and cherry red prismatic crystals of Proustite.

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Locality

Palermo mine, Groton, Grafton Co., New Hampshire, United States

Formula

Ca₄Fe³⁺₂(PO₄)₄(OH)₂·3H₂O

Size

SmCabinet 5.5x4x3.5cm

Tagged

phosphate , pegmatite mineral

Yellow, straw-like crystals of Xanthoxenite to 3mm. Very nice specimen.

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Locality

Ankaratra, Ambatolampy, Vakinankaratra, Madagascar

Formula

YPO₄

Size

SmCabinet 6x4x3.5cm

Tagged

phosphate , REE mineral

An aggregate of several Xenotime crystals to 3cm. An excellent specimen by any measure.

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Locality

Sabinópolis, Minas Gerais, Brazil

Formula

YPO₄

Size

Thumbnail 2.5x2x1.3cm

Tagged

phosphate , REE mineral

Excellent rare specimen of Xenotime with hundreds of tan crystals to 1mm in a flower-like cluster.