Kentrolite (found in 1898)
Small Cabinet, 7.5 x 5.0 x 4.5 cm
Langban mine, Filipstad, Varmland, Sweden
Ex. Paulo Matioli

Large, granular massive, glistening metallic, dark gray kentrolite is intergrown with minor disseminated calcite. Under the microscope, many of the kentrolite grains reveal themselves as <1mm, subhedral to euhedral crystals. A very hefty specimen of this lead manganese silicate from Langban, Filipstad, Varmland, Sweden. The label from the Swedish Museum indicates it was collected in 1898! Ex. Paulo Matioli collection.