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Biotite from Holmesburg Granite Quarry, Philadelphia, formerly Holmesburg, Pennsylvania

 
Biotite from Holmesburg Granite Quarry, Philadelphia, formerly Holmesburg, Pennsylvania

Biotite from Holmesburg Granite Quarry, Philadelphia, formerly Holmesburg, Pennsylvania

DESCRIPTION:No. 27972
Mineral:Biotite
Locality:Holmesburg Granite Quarry, Philadelphia, formerly Holmesburg, Pennsylvania
Description:Shiny crystals of black biotite mica collected ca. 1920 from an old granite quarry in Holmesburg, now part of Philadelphia. Ex. A. Lincoln Sherk II, MD. (1896-1970)
Overall Size:6x4x1.5 cm
Crystals:3-5 cm
Status: Sold - Posted here for reference only
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