RARE MINERALS, NATIVE ELEMENTS & MICROS FOR DISCRIMINATING COLLECTORS
All are miniature size specimens, that is ~ 1 ˝” to 2”size. They are priced according to richness, and amount of crystallization. All of the specimens have rich, to very rich, somewhat waxy luster, colorless to pale yellow crystalline and crystallized Iodargyrite in / on dark colored Goethite / Quartz / Spessartine matrix. Pricing is dependent upon the richness of the Iodargyrite, rather than on the size of the matrix. Iodargyrite is a silver-bearing halide with the chemical composition: AgI. The field of view (FOV) is 8 mm X 6 mm on each of the accompanying photos. Brief individual descriptions follow:
Item 2554 Rich micro crystalline and micro crystals of Iodargyrite are on Quartz / Goethite matrix, along with scattered micro crystals of light beer bottle brown color Spessartine Garnet crystals. The Spessartine crystals are usually coated with a micro thin film of Goethite.
Item 2555 Same as 2554.
Item 2556 This example exhibits very rich deposition of Iodargyrite micro crystals, richly scattered in open vuggy areas covering much of the surface of the matrix.
Item 2557 A very rich aggregate of translucent, lamellar white Iodargyrite is on one end of the specimen, accompanied by rich amounts of crystalline and micro crystals of white to very pale yellow Iodargyrite.
Item 2558 The matrix for this specimen is a
solid mass of dark red-brown Goethite, sawed on the base, with a mini-veinlet
of Quartz cutting through the Goethite. Fairly sharp for the mineral, micro
crystalline and crystals of Iodargyrite were deposited in several small open
vuggy areas in the matrix.
Extra rich, dark red-black crystalline / massive veinlets of Lepidocrocite are in / on matrix associated with massive to botryoidal, dark brown Goethite. Lepidocrocite is an uncommon iron oxide mineral with the composition: y-Fe3+O(OH).
Dark royal blue color Henmilite xls. are scattered on light colored / white matrix, often semi-botryoidal in habit. Note that in addition to Calcite, there are several rare white minerals found at the Fuka Mine. In some cases, more than one of these white minerals can be found associated on the same specimen. For this reason, it is not appropriate to name the associated white minerals on the specimens listed below, as each specimen would have to be individually analyzed to correctly identify the associates. There are several areas on most of the specimens where a pale aqua color massive mineral is present, as seen in the accompanying photographs. The name of this associated mineral is unknown. Chemical composition of Henmilite is: Ca2Cu[B(OH)4]2(OH)4
Copyright 1998-2016 by Mineralogical Research Co.
All rights reserved.