Fine Mineral Specimens Over $50
- Availability
- Sold
- Locality
- Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
- Formula
- (Fe3+)24AlO6(PO4)17(OH)12·75H2O
- Size
- 7 x 4 x 2 cm - Sm Cabinet
- Tagged
- phosphate
This specimen is covered with yellow to golden brown spheroidal crystal groups to 1mm of radiating Cacoxenite crystals. A superb specimen from this important mineral locality.
- Availability
- Sold
- Locality
- Mogul of Prince Albert mine, Cripple Creek, Teller Co., Colorado, United States
- Formula
- AuTe2
- Size
- 6 x 4.3 x 4 cm - Sm Cabinet
- Tagged
- tellurium, gold
- Special Info
- Raman
Dull goldish prismatic crystals to 1mm in groups to 3mm and with scatered groups in vuggy matrix.
This mine is not reported to have tellurides at least on Mindat. It came out of the collection of Delbert Brown, a deceased geologist who was located in Custer, SD. Delbert spent a lot of time in Colorado collecing at some of the old mines. A typed label has "Mogul" of the Prince Albert mine. The research I have done did not uncover this exact locality, however there is a Prince Albert mine. Raman verified as Calaverite.
- Availability
- Available
- Price
- $250.00
- Locality
- Santa Eulalia, Chihuahua, Mexico
- Formula
- CaCO3
- Size
- 13 x 10 x 4 cm - Cabinet
- Tagged
- carbonate
Colorless to slightly yellow, lustrous Calcite crystals to 2.5cm. Nice display specimen.
- Availability
- Available
- Price
- $975.00
- Locality
- America mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- CaCO3
- Size
- 17.5 x 16 x 6 cm - Cabinet
- Tagged
- carbonate
- Special Info
- Fluorescent
This is a large cabinet specimen purchased by Arnold Hampson in 1972 in Santa Eulalia. There are two very distinct generations of Calcite, which are called "Mariposa" (butterfly) habit. The first generation are scalenohedral crystals measuring 3 to 4cm and are covered by glitterly iron-oxides and/or Siderite. The second generation overgrows the first and are simple yellow rhombic Calcite. The first generation is highly fluorescent red, but is hard to through the oxide coatings. However, flipping the specimen over you will see the intense red patterns of growth under shortwave UV.
It is a beautiful specimen in which the photos do not give justice. The special edition on Santa Eulalia in the Mineralogical Record describes these Calcite crystals and the Mariposa habit including a few photos. On the outer edge are two broken off crystals, which do not detract from the overall appearance. In order to extract these from the wall, it was inevitable.
- Availability
- Available
- Price
- $850.00
- Locality
- America mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- CaCO3
- Size
- 16 x 13.5 x 6 cm - Cabinet
- Tagged
- carbonate
"Mariposa" habit Calcite crystals to 3cm. The Mariposa habit is formed by two generations of Calcite. The first is easily seen since it is coated with a thin veneer of brown iron oxide. The first generation are scalenohedral crystals, and the second is an overgrowth which totally wraps around the first giving an appearance that of a snow-capped mounain range. The very tips of the crystals are sharp as a pin. The Mineralogical Record issue of "Santa Eulalia" describes these clusters. The specimen is in excellent condition and any serious collector of fine Mexican minerals should have one of these in their collection.
- Availability
- Sold
- Locality
- Basic Refractories mine, Gabbs, Nye Co., Nevada, United States
- Formula
- Cu2Mg2CO3(OH)6·2H2O
- Size
- 4.5 x 3.5 x 2 cm - Miniature
- Tagged
- carbonate, copper
- Special Info
- Type Locality
Deep blue crystals to less than 0.5mm with white Hydromagnesite.
