MINERAL SPECIMENS FOR DISPLAY
= Fluorescent
Specimen
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Radioactive Specimen
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GALENA Mandan Orefield, near Mandan, Southern Rhodope Mountains, Bulgaria The Mandan Orefield is situated near the Bulgaria-Greece border, and the sulfide ores of the district have been mined since the 5th-6th centuries, B.C. ! A very good article covering the mines and minerals of the Mandan Orefield appears in the "Mineralogical Record" magazine, Vol. 22, No. 6 (Nov-Dec 1991), P. 439-445 -- data on the various crystal habits of Galena is given on P. 443-444. The two specimens listed below are both aesthetically appealing crystal groups of sharp, metallic luster, lead-gray crystals on matrix. The largest Galena crystal on item A. is a cube with octahedral faces, measuring 1/2" X 1/2". Micro crystals of Quartz are associated on item A. The largest Galena crystal on item B. is a 1/2" X 3/8" cube, and the associated minerals are micro crystals of Quartz, Sphalerite, and Chlorite. Order items MI-003, A. or B.
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HEMATITE Monte Calvario, Biancavilla, Catania, Italy These exceptionally brilliant black, submetallic luster, tabular Hematite crystal groups are available from a find made in 1982. All specimens have extra sharp, striated and/or stepped growth faces with mirror-like surfaces, without matrix. Item A. is a "thumbnail" size specimen mounted in a 1 1/4" cubic black base, clear lid Perky Box. Items B. and C. are not mounted.
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RHODONITE ! ! ! Yes, this is crystallized Rhodonite, not Rhodochrosite! This occurrence was reported in
the "Mineralogical Record" magazine, special issue on Peruvian localities,
July-Aug 1997, page 56 (28:4:56). The occurrence is also mentioned briefly in the
"Mineral News", June 1998, page 5, paragraph 1. As shown in the accompanying
photographs, the Rhodonite from this locality has formed groups composed of individual,
often prismatic, terminated crystals, with little or no matrix. The specimens offered here were
mined in 1997-1998. Associates noted include minor amounts of tiny
colorless Quartz crystals.
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