Rough Optical Calcite with Inclusions / 1.5-2.5" AVG - 1 KILO LOT #1 and increased internal cleaving and

and increased internal cleaving and inclusions

Silver-Plated Oco Geode Slice with Crystal Quartz Point Pendant

Fluorite is known as one of the most colorful gemstones

Beads measure approximately 8 millimeters

Rough Optical Calcite with Inclusions / 1.5-2.5" AVG - 1 KILO LOT #1 and increased internal cleaving andQuantity: 1 kilogram 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.