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Fluorescent Specimen
= Radioactive Specimen
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PYRARGYRITE, POLYBASITE, ACANTHITE,
PYRITE, QUARTZ, CALCITE Uchucchacua Mine, Lima Dept., Peru More than 10 sharp black Pyrargyrite crystals are scattered over the surface of the matrix, ranging in size from ~2 mm size, up to 14 - 15 mm size (1/2"+). The two largest Pyrargyrite crystals measure 9 X 15 mm, and 11 X 14 mm. The matrix on this specimen is composed of intergrown massive Pyrite and Quartz, with minor massive black Acanthite. More than 10 small, extra sharp black bladed Polybasite crystals are standing up on edge on the top surface of the matrix, associated with numerous small, sparkly Quartz crystals, and a few scattered micro crystals of Calcite. Very nice specimen, overall, for collection of sulfides / sulfosalts, or Silver-bearing minerals. The chemical composition of Pyrargyrite is: Ag3SbS3. A brief description of the Uchucchacua Mine and minerals found at this locality can be found in the "Mineralogical Record" magazine, Vol. 28, No. 4, P. 58-59 (special issue on Mines and Minerals of Peru). Specimen size: 3" X 2 1/2" across, X ~ 3/4" to 7/8" thick. Order Item MI-1006 Price: $375. SOLD |
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QUARTZ Amethyst Las Vigas, Veracruz, Mexico Three transparent, bright purple Amethyst crystals form a V-shaped grouping, associated with three smaller, colorless Quartz crystals. The two largest Amethyst crystals are each 1 1/4" in length, and 1/2" to 5/8" in diameter. The crystal on the left, as the specimen is oriented in the photo, is a scepter with an approximately 1/4" neck, best seen from the back of the specimen. Phantom growth can be seen within the terminations of the two largest crystals. A very minor amount of dark green massive Epidote is associated at the base of the specimen no rock matrix. F. Marshall collection. Specimen size: 1 1/4" tall, 1 1/4" wide at the top of the V, and 5/8" thick. Order Item MI-062 SOLD |
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PYRITE Huanzala Mine, Huanuco, Ancash Province, Peru This locality for Pyrite (and the crystal forms encountered at the Huanzala Mine) is described in the "Mineralogical Record" magazine, Vol. 28, No. 4, July-Aug. 1997 (special issue on Peruvian mineral localities), P. 53. This unusual stalactitic form is not mentioned by the authors of the article. The specimens offered here are stalactitic in form, i.e., each specimen has a finger-like central core composed of massive Pyrite, upon which many individual, bright brassy metallic dodecahedral Pyrite crystals were formed. The crystals range in size from 1/8", up to 1/2" across on item A., D., and E., and up to 5/8" across on items B. and C. None of the specimens have rock matrix.
Sizes and prices are as follows. The sizes are given as length and diameter, in inches.
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GOLD Trinity River, Trinity County, California Mining began in the Trinity River area of the famous California Mother Lode district in the early 1850s and continues in some of the tributaries of this river, on a very small scale, even today. Many millions of dollars of Gold were recovered during the past 150 years in both lode and placer operations, i.e., hard rock mining, as well as dredging and hydraulic mining. The three large placer nuggets offered here are from the F. Marshall collection. It was virtually impossible to determine which side was the most photogenic on these specimens, so we have included illustrations of both sides of each specimen all are attractive, and quite suitable for display. Item C. is pierced by a natural hole .possibly a void where a Quartz crystal was once present, while the specimen was still in its natural state, in situ. Sizes below are given: length X width X thickness, in inches. Pricing is calculated at $25. / gram for item A., and $28. / gram for items B. and C.
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CALCITE with MALACHITE inclusions Copper Queen Mine, Bisbee, Cochise County, Arizona Several habits of crystallized Calcite with Malachite inclusions were found in the various levels of the Copper Queen Mine for a generalized description, see the "Mineralogical Record" magazine, Vol. 12, No. 5, P. 297 (Sept-Oct 1981, special Bisbee issue). This specimen has many intergrown, as well as individual terminated Calcite crystals. The Malachite inclusions in the Calcite color the specimen light green at the base, and the green color gradually grades up to white at the tips of the crystals. The specimen has no rock matrix. F. Marshall collection. Specimen size: 2 3/8" wide, 1 1/2" thick, 2" tall Order Item MI-065 SOLD |
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