SPECTACULAR DISC-SHAPED CRYSTALIZATION OF THIS PLASTER. VERY HIGH QUALITY FAN-SHAPED GLASS EXPOSED ON WOODEN PEDESTAL. PRIVATE COLLECTION PIECE NOW OFFERING TO SELL.
Gypsum is a mineral composed of calcium sulfate.
It is a sedimentary rock of chemical origin. It is very common and can form sedimentary rocks.
Gypsum crystallizes in prismatic habit, tabular and rhombic shaped crystals with beveled edges. It appears in crystals, sometimes large and arrowhead or spearhead.
