= Fluorescent Specimen
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COPPER (native) Cu "SKULL" Centennial # 6 Mine, Houghton County, Keweenaw Peninsula, Michigan The name "skull" was given to native Copper specimens from the Keweenaw Peninsula, in which the Copper was deposited surrounding glacial pebbles. These unusual formations, after the glacial pebbles have become detached, are essentially a hollow cast after the pebble, composed entirely of native Copper -- they actually do not have anything to do with the skulls of animals, etc.! The Centennial # 6 Mine is one of the Keweenaw Peninsula’s best known sources for these Copper "skulls". A secondary patina, composed of an unidentified blue-green mineral, can be seen on portions of some of the specimens -- providing colorful accents to the bright, natural (not overly-cleaned) native Copper. None of the specimens have rock matrix. Order item MS-016 A, B, C, D.
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WAVELLITE Mauldin Mountain, Mt. Ida, Montgomery Co., Arkansas Bright green Wavellite has formed numerous hemispherical intergrowths, completely covering the front surface of the specimen. Unlike most Wavellite occurrences in Arkansas, where the Wavellite was deposited as thin veins in fractures in the host rock, the Mauldin Mountain Wavellite has formed in open vugs, so the hemispherical (botryoidal) intergrowths have had an opportunity to develop fully. Each of the hemispheres is composed of many hundreds of prismatic, radiating, terminated Wavellite crystals. The radiating structure can be seen around the perimeter of the specimen. Order item MI-004 Size: 2 5/8" X 1 5/8" X 3/4" thick. Price: $80.00 Discount Price: $55.00 SOLD |
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