Tumbled Stromatolite / 20-35mm AVG - 1 LB. LOT Menu Arrowhead Avg Size Range: (7 inches

Avg Size Range: (7 inches in diameter)

Origin: MADAGASCAR

a mineral usually found in igneous rock and the upper mantle below the Earth's crust

Black Agate Resin Moon on Metal Base

Tumbled Stromatolite / 20-35mm AVG - 1 LB. LOT Menu Arrowhead Avg Size Range: (7 inchesQuantity: 1 pound Average size range: 20 to 35 millimeters Stromatolites are layered sedimentary stones formed by photosynthetic bacteria. These bacteria form mineral layers by cementing local stone, sand, and gravel together over long periods of time. These structures can reach over 3 feet tall, and fossilized stromatolites are useful records of Precambrian life in paleontology.