Intergrown cleiophane crystals – Madan, Bulgaria | Ref. 274

Specimen overview

This specimen consists of two well-developed main cleophane crystals that are closely intergrown. Their colour appears almost black in the thicker areas, while the edges and thinner sections reveal olive-green tones under the light.

The surfaces alternate between lustrous faces, growth planes and more irregular areas bearing several secondary crystals. Viewing both sides reveals a complex crystallisation, with two clearly defined main forms and a concentration of intergrown crystals in the central area.

Provenance

This specimen comes from the 9th of September mine in the Madan mining district, Bulgaria. It was collected in 1990.

Dimensions and presentation

The specimen measures 56 mm in length, 32 mm in width and 36 mm in height, excluding the stand.

Weight: 154 g including the acrylic stand.