Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Quantity: 75 grams

Quantity: 75 grams

Leather Journal/Notebook with Key

shaped by the geological processes of mineral precipitation and crystallization during its development

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

Pieces measure approximately 14-16" (AVERAGE SIZE)

Yellow Optical Calcite / 1.5-2.5" AVG - 1 LB. LOT Menu Animal Quantity: 75 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.