Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Avg Size Range: (2 to

Avg Size Range: (2 to 3 inches)

Leather Journal/Notebook with Key

chips measure approximately 4 to 7 millimeters) Sizes Vary

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

Quantity: 75 grams

Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Avg Size Range: (2 toQuantity: 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.