L archived mineral specimens

Lamprophyllite

#PD34648

Availability: Sold

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.

Lamprophyllite at Dakota Matrix Lamprophyllite at WebMineral Lamprophyllite at MinDat

Langite

#PD33206R

Availability: Sold

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.

Langite at Dakota Matrix Langite at WebMineral Langite at MinDat

Langite

#PD40892

Availability: Sold

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.

Langite at Dakota Matrix Langite at WebMineral Langite at MinDat

Lanthanite-(Nd)

#PD37897

Availability: Sold

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.

Lanthanite-(Nd) at Dakota Matrix Lanthanite-(Nd) at WebMineral Lanthanite-(Nd) at MinDat