HEV1- Helvite Navegador Mine, Conselneiro Pena, Minas Gerais, Brazil 4.5x 3.5x 3.0 cm $175 A matrix specimen of helvite tetrahedrons to .7 cm from the 2003 find.  There is also a sharp muscovite book on the specimen, measuring 1.9 cm across.  Personally, I find these more appealing than the Fujian helvites, on account of the contrast created by the albite matrix.

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