Orange calcite mineral samples supplied by weight, this rich orange variation is due to the presence of iron hematite impurities within the crystals. These particular samples also show a more crystalline structure of calcite and is known as ‘massive’. This orange calcite is available by weight, starting from 500 grams, and is suitable for lapidary, educational and enthusiasts use. The pieces vary from 20 mm to 100 mm though most pieces will sit in-between and come supplied in a polythene bag with a label.