8.4 x 5.3 x 5.3 cm. A brassy, nearly solid specimen of algodonite, a rare copper arsenide, from the Keweenaw Peninsula of Michigan. Undoubtedly an old piece. Ex Dr. Gary Hansen Collection. HEAVY at 474 grams or just over 1 pound!
2.5 x 2.3 x 1.9 cm. Domeykite and algodonite are rare copper, arsenic alloys and alloy-like compounds. This is an EXCELLENT, complete all-around thumbnail specimen with super, copper patina and nice form from the famous Cashin Mine of Colorado. SELDOM do you see domeykite with algodonite crystals in this sharpness. Rare, old-time material in this quality from the Carl Davis Collection.
4.8 x 3.1 x 2.8 cm. According to mindat.com, whitneyite is variety of copper containing up to 11.5% arsenic, with some intimately intergrown algodonite, and not a distinct species. The blue smudge is perhaps azurite. A nice massive sample of the material. Ex. Richard Hauck Collection.
5.1 x 4.4 x 3.6 cm. This is an extremely heavy copper species, being mostly copper. Even though it is not crystalline, it is a rare mineral species and this is a rich piece. The color is very much like that of crystallized copper, with a good patina. Ex. Richard Hauck Collection.
A showy, old-time specimen of massive, lightly iridescent, brassy algodonite with radial, colorless to off-white quartz crystal clusters from the famous Keweenaw Peninsula of Michigan. Algodonite is a copper arsenide and this is an excellent representatiive specimen. Ex Richard Hauck Collection. it goes as a nice set with the domeykite earlier in teh auction 5.6 x 5.2 x 3.5 cm
ex. Richard Hauck
This is an extremely heavy copper species, being mostly copper. Even though it is not crystalline, it is a rare mineral species and this is a rich piece. The color is very much like that of crystallized copper, with a good patina.
ex. Richard Hauck
According to webmineral.com, whitneyite is actually a synonym of algodonite, and not a distinct species, in which case the blue smudge is perhaps azurite, and the whole piece here is algodonite. (a nice massive sample of the material)
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