XL Black Septarian Crystal Egg

XL Very Large Septarian Crystal Egg

Large Septarian Crystal Egg with cutbase, expertly polished and a very striking piece

Size : 12 x 8 inch approx.

Weight : 19 KG

Location : Madagascar

You will receive the exact crystal pictured

Septarian: A result of volcanic eruptions, dead sea life was chemically attracted to the sediment around them, forming mud balls. As the ocean receded, the balls dried and cracked. Due to their bentonite content they also shrank in size and basically made the Fossil explode, creating the cracks inside. As decomposed shells seeped down into the cracks in the mud balls, calcite crystals formed. The outer thin walls of calcite then transformed into aragonite

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