Huge Septarian \"Lightening\" Slab Slice Aragonite Calcite Polished Rock For Sale

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Huge Septarian \"Lightening\" Slab Slice Aragonite Calcite Polished Rock:
$29.99

This is a genuine Large Septarian \"Lightening\" Slab specimen with 2 Diamond Cut & Polished Sides!

4.5”inches x 4\" inches in diameter.

Weight: Approx. 3/4 pound (11 oz, )

Yellow center is Calcite

Brown Borders is Aragonite

Gray rock is Limestone from Utah

One side is polished to a high Mirror Gloss

You will Receive only the Large Septarian Rock Slab in the photo.

SEPTARIAN Rock Specimens

Septarian nodules are found 15 miles E of Zion National Park, Utah. They were formed in an ancient sea floor during the Cretaceous period, 50-70 million years ago when the Gulf of Mexico extended into Utah. On the ocean floor, mud formed around decomposed sea life. Rocking back and forth in the water caused mud balls. When the ocean receded, the mud balls dried and cracked open.

Over the eons to follow, mineralized solutions deposited in the cracks. First forming brown ARAGONITE, then golden CALCITE and occasionally BARITE clusters were formed within the cavities. The outside of the mud ball is now a gray limestone rock. As the nodules weathered out of the gray clay hills, at one time they could be picked up by hand on the surface. Now, excavating equipment is required for extraction, 20-40 feet underground.

The name \"Septarian\" is Latin \"Septem\" meaning seven. The mud balls cracked with seven points in every direction, creating a beautiful design. The fossil which started forming the Septarian nodule is sometimes noticeable in the rock.

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