RARE - HETEROGENITE with CHRYSOCOLLA - collector specimen - superb botryoidal formations - no reserve price - Height: 6.8 cm - Width: 3.5 cm- 37 g

Heterogenite is a relatively rare cobalt oxide mineral that often occurs in oxidized zones of cobalt-rich ore deposits. This specimen adorned with chrysocolla, a hydrated copper silicate known for its vivid blue-green color and attractive botryoidal (grape-like) formations, stands out as a collector's piece due to its unique mineral association and excellent crystal habit. The botryoidal formations typical of chrysocolla create beautiful rounded surfaces, contrasting with the more massive or granular heterogenite. Such combinations highlight secondary mineralization processes and provide valuable insights into cobalt and copper ore geology. The rarity and aesthetic appeal of this specimen make it especially interesting for mineral enthusiasts.