L archived mineral specimens

Lautite

#43683

Availability: Sold

Locality: Mundo Nuevo, La Libertad dept., Peru
Formula: CuAsS
Size: Miniature 5x3x2.5cm
Tagged: sulfide , copper

A large single iridescent, metallic crystal of Tennantite 5cm long with superb rosette-like crystal groups from 1 to 3mm. The groups are composed of platy crystals with rounded edges. Lautite is orthorhombic and these crystals are consistent with the 1944 sketch by C. Palache, H. Berman, C. Frondel, in The system of mineralogy. Vol I, 7th edition, John Wiley & Sons, New York.

Lautite at Dakota Matrix Lautite at WebMineral Lautite at MinDat

Lautite

#38415

Availability: Sold

Locality: Lauta, Marienberg dist., Erzgebirge, Saxony, Germany
Formula: CuAsS
Size: Thumbnail 3x2.5x1cm
Tagged: sulfide , copper
Special Info: Type Locality

A rich almost totally pure crystal mass showing platy crystals to 1cm compact in matrix. This is a type localty specimen derived from the Freiburg Museum and is historically significant. See provenece tab for original tag with a number matching the specimen. An excellent specimen of which is virtually impossible to obtain from this locality.

Lautite at Dakota Matrix Lautite at WebMineral Lautite at MinDat

Lava

#PD32795

Availability: Sold

Locality: Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy
Size: SmCabinet 7.5x1.5x3.5cm
Tagged: antique
Special Info: Antique Specimen

Three pieces of mafic rock, possibly a Basalt or Shoshonite(?), that have the words 'Salvatore Madonna' etched or impressed on one side and the date '1882' on the backside. Additionally there is an old label from the Geologic Institute at the University of Amsterdam that also notes it is a 'Basaltlava' from 1882.

Unfortunately, I was unable to find any details of the 1882 eruption and I'd definitely be interested to know how the words and date were formed on the pieces.

Lava at WebMineral Lava at MinDat