Quartz and Gemstone Specimens — Johann Gottlob Kurr Postcard

This plate is a page from a 19th-century mineralogy atlas by Johann Gottlob Kurr, cataloguing crystal formations in fine engraved and hand-tinted detail — clusters of clear quartz, a violet amethyst geode, banded agate, and a slice of petrified wood.

• Postcard, part of the “Autumn in the Paintings of Masters” series
• Paper density: 350 g/m²
• Size: 10×15 cm

An unusual pick for anyone collecting science or natural-history ephemera rather than landscapes.