MINERALS INDEX
Descloizite |
| (Pb,Zn)2(OH)VO4 |
| Orthorhombic |
Minute pale-yellow crystals, too rough to yield measurements, were found implanted on a fragment of decayed jeffersonite in the Hancock. collection and proved on chemical examination to be descloizite. The specimen was collected by Mr. Hancock at Sterling Hill, and the mineral is doubtless an alteration product of galena, which is abundant at the locality.
Dark-red needles of microscopic size were found in a vein at Franklin that contained particularly fine crystals of tephroite, hodgkinsonite, and green willemite. The needles were too minute for accurate measurement, but their crystal angles were approximately the same as those of descloizite, and chemical tests for vanadium and their high refractive index confirmed that identification. Their vivid red color is probably due to a small amount of contained manganese.
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© by Herb Yeates 1997-2006.
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page created: August 12, 2006 5:58 PM
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