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Franckeite from USA

QX6-6H4Franckeite Fe2+(Pb,Sn2+)6Sn4+2Sb2S14

Multiple photos available
01376360017363946075022.jpg
Pacific Cement and Aggregate Company quarry, Santa Cruz, Santa Cruz County, California, USA

Dimensions: 5.6 cm x 3.8 cm x 2.2 cm

5.6 x 3.8 x 2.2 cm Ex. California Academy of Sciences - collected 1954
Massive and broken long crystals with a bright metallic silver to dark gray color.
Copyright: © mwminerals.com      Photo ID: 422009     Uploaded by: Walter Kellogg   Approval date: 2011-11-03   View Count: 745   Approval status: Public galleries    Type: Photo - 769 x 550 pixels (0.4 Mpix)

N8N-5U5Franckeite Fe2+(Pb,Sn2+)6Sn4+2Sb2S14

Multiple photos available
06257950017272011527274.jpg
Pacific Cement and Aggregate Company quarry, Santa Cruz, Santa Cruz County, California, USA

Dimensions: 4.1 cm x 3.6 cm x 1.8 cm

4.1 x 3.6 x 1.8 cm

This is an interesting rarity. Here is a seldom seen piece of the rare iron lead antimony tin sulfosalt, franckeite from the Kalkar limestone quarry in California. It features silvery-grey spots of franckeite on host rock matrix. From the collection of Allen Heyl, who obtained it from the David Harrison collection via the Rocksmiths.
Copyright: © Brian Kosnar - Mineral Classics      Photo ID: 700071     Uploaded by: Brian Kosnar   Approval date: 2015-08-12   View Count: 371   Approval status: Public galleries    Type: Photo - 432 x 432 pixels (0.2 Mpix)
 
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