Hand-Carved Bolivian Stromatolite Spheres

Formed by ancient microbial activity, these Curator's Choice Bolivian Stromatolite Spheres are among the most fascinating fossil materials on Earth — layered limestone built up by cyanobacteria from the Cretaceous period, preserved in stone. These 1.9″–2.3″ hand-carved and polished spheres reveal that signature concentric banding in warm browns and greys, each one a unique cross-section of natural history. Because these are hand-carved, no two are perfectly round — adding to the organic character and authenticity that makes each piece genuinely one of a kind. Smooth, weighty, and tactile, they read as décor first and conversation piece always. You will receive one Hand Carved Stromatolite Sphere sized between 1.9" - 2.3", similar to those pictured, each with its own unique pattern and coloration.