Zincite from olcuwiecz poland
Size-
5.4cm x 3.8cm x 2.5cm
Weight-
35g
You will receive the item in the photo
Zincite mineral class is oxides. Its chemical structure is composed of zinc bonded with oxygen,often with impurities like magnesium and iron substituting for zinc to give it its distinct colour. The crystal system is hexagonal. The hardness is 4-4.5 on the MOHs scale.