Quartz on sphalerite (weird piece)

Romania, Maramureș County, Baia Mare, Herja Mine.

Quartz on sphalerite (weird piece)
29.50 *Prices include VAT
Article codeIV.D.0110.231
A somewhat strange looking piece consisting of deep black sphalerite covered with a non-contiguous thin layer of fine quartz crystals.
The pyrrhotite crystals are also covered on one side with quartz.
Measures: 85x80x30mm. Weighs: approximately 320 grams.