MINERAL SPECIMENS FOR DISPLAY
= Fluorescent Specimen
= Radioactive Specimen
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PYRITIZED BRACHIOPOD
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GRAPHITE
(native C)
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| SILVER (native Ag) Uchucchacua Mine, Oyon Province, Lima Dept., Peru For background information on this locality, refer to the “Mineralogical Record” magazine, Vol. 28, No. 4 (special issue on the “Mines and Minerals of Peru”), July-Aug 1997, Page 61. The Uchucchacua Mine is known for spectacular examples of wire Silver. The three specimens pictured here were mined circa 2004. * Item A. has a slightly curved, individual Silver wire 3/4” in length protruding from the top of the matrix. Small amounts of wire Silver are also present on the side of the specimen, not visible in the photograph. Rich amounts of massive black Acanthite are associated. * Item B. has two attractive, curved, native Silver wires protruding from the top of the matrix. The largest of the two Silver wires measures 1" tall X 1/8" wide at the base. The smaller wire is 1/2" long. Very rich amounts of small Silver wires are also protruding from the front and back of the matrix. An open vug, on the top of the matrix, is lined with drusy white Calcite crystals. Minor black massive Acanthite is present, intergrown in the matrix. * Item C. has 6 distinct native Silver wires
standing up along the top of the matrix. The largest wire forms an L shape,
positioned near the right side of the specimen. It measures 7/8” in length
X near 1/4” wide at the thickest part of the L. The other wires range in
size from 1/4” to 1/2” tall, and the matrix is richly included with masses
and wires of Silver as well as massive black Acanthite. The back of the
matrix has been sawed.
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TOPAZ Gilgit Division, Pakistan Excellent quality, sherry color single crystal of Topaz without matrix. Very gemmy! Specimen size: 1 1/2" tall, 1" wide, 7/8" thick Order Item MI-1123 Price: $400. SOLD |
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QUARTZ (pseudo-bipyramidal) Sovietskiy #2 Mine, Dal’negorsk, Primorskiy Kray, Russia The occurrence of pseudo-bipyramidal Quartz crystals at the Sovietskiy #2 Mine is mentioned in the special Dal’negorsk issue of the “Mineralogical Record” magazine, Vol. 32, P. 26-28. These unusual, translucent Quartz crystals have no prism faces, and average ~ 3/8” in size. The individual pseudo-bipyramidal crystals are intergrown, forming clusters of “thumbnail” specimen size, without matrix.
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MANGANITE
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PSEUDOBOLEITE on BOLEITE Amelia Mine, Boleo Copper District, Santa Rosalia, Baja California, Mexico The Boleo Copper District is the type locality for both Pseudoboleite and Boleite. Pseudoboleite is always associated with Boleite, as an epitaxial overgrowth upon the face(s) of a cube of Boleite. See the idealized crystal drawings illustrating Pseudoboleite on Boleite in the "Mineralogical Record" magazine, Vol. 29, No. 1, P. 44, Fig. 44 (special Mexico I issue). The specimens offered here are not symmetrically perfect, as shown in the crystal drawings. They do, however, show the Pseudoboleite overgrowth on one or more of the Boleite crystal faces, similar to the drawing with the simple faces illustrated in the lower left corner of the "MR" reference, Fig. 44 as noted above. Color is dark royal blue, similar to the color of the specimen illustrated in Fig. 17, P. 61 of the "MR" reference. The tiny specks of orange-brown material shown in some of the photos, adhering to the crystals, are tiny specks of Montmorillonite clay – the host material in which the crystals were found. See P. 56 of the "MR" reference for information on the ore bed, and the varicolored Montmorillonite clay. Order Item MI-1070, items A., B., C., or D.
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