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Genthelvite


Genthelvite : Zn4Be3[S|(SiO4)3]

Photo Copyright © Saul Krotki 2008  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Washington Pass, Golden Horn Batholith, Okanogan Co., Washington, USA
Genthelvite, North Cascade Highway, milepost 164, Okanogan Co., WA. Electron microprobe EDS spectral analysis at Cannon Microprobe, Seattle, WA, November 2008, indicates a member of the danalite(Fe)—helvite(Mn)—genthelvite(Zn) series. We find a nearly balanced proportional contribution of all three elements. Genthelvite is named as Zn is dominant with Fe slightly higher than Mn. Only two crystals have come to our attention, one sacrificed for this study, and the other preserved and shown here. From the "White Boulder" collecting area. Photomicrograph © Saul Krotki 2008(.0878.2). Field of view 3.0 mm.

This Photo was Mindat.org Photo of the Day - 1st Jan 2009

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