Quartz and Galena Crystal Cluster | 59 grams | Mogila, Madan, Bulgaria Erythrite Size: 24x12mm

Size:  24x12mm

Appraised Value :  $653

Microcline is one of the most common feldspar minerals

however tons of them were used during the 80's for lapidary faceting

It's also said to aid concentration and memory

Quartz and Galena Crystal Cluster | 59 grams | Mogila, Madan, Bulgaria Erythrite Size: 24x12mmThe LeadZinc deposits of Madan Ore Field (Southwest Rhodopy Mountains) were operated by the Turks in the Middle Ages. Greek coins from Tassos island dating from 14th century AD, have been found in the ancient galleries. As well, the name of the Madan field, which in Turkish means Ore, originates from that time. The Madan Ore Field is built up mainly of the highly crystalline rocks of the lower (Ar) and upper (Pt) metamorphic units which form the Madan