We are pleased to offer for sale this large and rare Decrespignyite Specimen. Two sides of the rock show the bright blue mineral, the top side has great coverage and what an unusual shade of blue. Anyone with a mineral collection would fall of their chair for a piece of this. A rare collectors specimen and a relatively new mineral discovery. There is only one location for it, which is known for a highly unusual assemblage of secondary REE and Cu-REE carbonate minerals. Decrespignyite contains the rare mineral Yttrium (Y).
12.5cm x 4.5cm x 4cm, 306g.
Paratoo Mine, Olary District, South Australia.
Decrespignyite-(Y): Y4Cu(CO3)4Cl(OH)5 · 2H2O
Decrespignyite contains the rare mineral Yttrium. Yttrium is a rare-earth element (REE) that has a silvery-metallic luster. Symbol, Y. It occurs in nearly all of the rare-earth minerals. Recovered commercially from monazite sand and from bastnasite. Widely used: in colour television tubes; to reduce the grain size in chromium, molybdenum, zirconium, and titanium; to increase the strength of aluminum and magnesium alloys; as a deoxidizer for vanadium and other nonferrous metals; in nuclear technology for its high neutron transparency.