Polished Stone Slab Cotham Marble Stromatolite 3.25 inch Fossil #O3

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Cotham Marble Stromatolite Polished Stone Slab Fossil

This Cotham Marble slab is polished on one side, and natural rough on the edges. It is more than 3.25 inches tall by more than 2.75 inches and 7 mm thick.

Stromatolites are the oldest known fossils, dating back more than 3 billion years. Basically Stomatolites are prokaryotes (sort of an ancient cousin to algae) that thrived in warm aquatic environments and built reefs much the same way as coral does today.

They are the oldest living organisms on the planet, and are believed to be the first living organisms on Earth. The name Stromatolite comes from the Greek words that mean bed of rocks.

This material came from southwest England and is known as Cotham Marble, but it is actually a limestone.

It is from the Triassic period and is about 220 million years old.


U.S. Shipping terms: Cabochons, rough rock poundage and all orders over $50 are shipped for FREE in the U.S. On all others I offer First Class or Priority Mail and charge actual USPS shipping. Overnight shipping might be available but you need to call me to request it.

International Shipping terms: We offer Priority Mail or First Class (up to 4 pounds) which is the cheapest but is NOT tracked and can take 2-8 weeks for delivery. Customs, duties, taxes, etc. are the responsibility of the buyer.

You can click Add to Cart at any time, then go to cart and check for estimated shipping cost.

Please note: Items are One of A Kind, due to the natural stone material there may be some small natural flaws. Major flaws will be listed. You will always receive the item pictured unless otherwise noted! Any questions??-please contact me.