Very well developed floater formed by group of pseudohexagonal galena crystals, due to twining in Spinel law twin.
A spectacular specimen of transparent quartz on the mother rock with very large for Bulgaria clearly displeyed Japanese law twin.
Small qartz crystalz on the matrix. Almost every one of them is twined fallowing Japanese law . Some of nthe twins has joined their corners forming something like „buterfly“
Perfectly situated Japanes law twin in transparent quartz on the matrix