Home > Pseudomorphs – March 10 > MS1771 Plumbogummite after Pyromorphite

Plumbogummite after Pyromorphite - Sold

Plumbogummite is a lead aluminum phosphate. It forms by chemical alteration of pyromorphite, a lead phosphate. This is a large matrix example, with a 7.9 × 3.9 cm surface covered in tan crystals to 2 mm. A few fresh pyromorphite crystals remain, providing contrast in swamp green. This material came out in the 1970s, a note on the material appears in the Mineralogical Record, volume 8, number 5 (1977). At the time, it was thought to be hinsdalite. This specimen was part of the Charles Trantham (1936-2020) estate and carries an Al McGuinness (1926-1990) label.