Search Archived Mineral Specimens

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Locality

Abundancia mine, Guanaco, Santa Catalina, Antofagasta, Chile

Formula

Cu₃(AsO₄)₂

Size

Miniature 4x3.5x2cm

Tagged

arsenate , copper

Micro green crystals of rare Lammerite with bright blue rosettes of Lemanskiite.

Availability

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Locality

Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia

Formula

Na₃(SrNa)Ti₃(Si₂O₇)₂O₂(OH)₂

Size

Miniature 4.5x4x1.5cm

Long, bladed, orange-red divergent crystals to 2.5cm. There is a smaller spray as shown in the photos. Associated with Aegerine. The dark rusty red, larger grains are unidentified.

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Locality

Geevor mine, Pendeen, St Just dist., Cornwall, England

Formula

Cu₄SO₄(OH)₆·2H₂O

Size

Thumbnail 2.5x3x2cm

Tagged

arsenate , copper

Crust of patchy colored Langite.  Very small crystals are visible under magnification. 

Availability

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Locality

Levant mine, St. Just dist., Cornwall, England

Formula

Cu₄SO₄(OH)₆·2H₂O

Size

SmCabinet 6x3x5cm

Tagged

copper

Dark to light sky blue crusts. An older specimen with a Barstow label.

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Locality

Curitiba, Paraná, Brazil

Formula

Nd₂(CO₃)₃·8H₂O

Size

Thumbnail 2.5x1.5x0.3cm

Tagged

carbonate , REE mineral

Special Info

Type Locality

An excellent if not superb small specimen loaded with brilliant pink crystals of this rare REM. Named for the lanthanum in the composition with the dominance of neodymium over the other rare earth elements. A rare mineral that occurs as a secondary mineral, typically formed by the alteration of weathering of rare earth element-bearing minerals.

Availability

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Locality

Curitiba, Paraná, Brazil

Formula

La₂(CO₃)₃·8H₂O

Size

Chip xxcm

Tagged

carbonate , REE mineral

Small plate loaded with pink micro crystals.