- Proustite on Calcite
- Small Cabinet, 6.5 x 5.4 x 3.6 cm
- St. Andreasberg, Harz Mountains, Lower Saxony, Germany
A sharp 6 mm proustite crystal glows gem red when backlit, and other clusters of smaller crystals are present as well on a calcite matrix. Classic old material, and a rare piece with surviving documentation marking it as Andreasberg (though the calcite is also indicative). Label is dated 1831!