Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Pieces weigh approximately 300-750 grams

Pieces weigh approximately 300-750 grams each and measure about 3"-12" (AVERAGE SIZE)

Pieces measure 1"-2" approximately (AVERAGE SIZE)

Pieces measure approximately 14-16" (AVERAGE SIZE)

Listing is for (10 kilograms

Quantity: 75 grams

Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Pieces weigh approximately 300-750 gramsQuantity: 1 pound Average size range: 1. 5 to 2. 5 inches Optical calcite, also known as Iceland spar, is a special type of calcite that forms extremely clear and somewhat rectangular crystals. For centuries, sailors would use these crystals to help determine the direction of the sun on cloudy days for navigation. This optical calcite also contains trace iron impurities, giving it a faint yellow tinge.