Call Us: 1-866-354-0894

Rough Stromatolite

Rough Stromatolite


This is a different item here at the Rock Shed.  This is Stromatolite from Wyoming.   It will work nicely for cabochons, carvings, specimens and great for decoration.  Not every rock you receive will have the “bumpy top” shown in the pictures.

  • For size reference a fist size piece will weigh approximately 1 pound.

  • In any 5 pound or larger order, we will select an assortment of small to large fist size pieces for you.

MOHS hardness scale of  5 – 6



Stromatolites were formed in shallow water millions of years ago by the cementation of sedimentary grains by microorganisms.  They include some of the most ancient records of life on Earth. 

Additional information

Bag Size

2 Lbs Rough Stromatolite, 5 Lbs Rough Stromatolite

Contact Us

515 1st Street
Keystone, SD 57751

Order: 1-866-354-0894
Information: 605-666-4813

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