For Prehistoric Fossilized Sand Dollars & Sea Urchins (Auction 2026-06-05, Lot 124A)

$257.00

Prehistoric Seas, Paleozoic to Cenozoic Era, ca. 400 million to 2.6 million years ago. A collection of four fossilized echinoderms comprising prehistoric sea urchins and sand dollars, two preserved within natural stone matrix and two fully excavated and free-standing. The flattened sand dollars display the characteristic five-petal petaloid pattern radiating across their discs, a remnant of the living animal’s structure, while their smooth surfaces reflect the loss of delicate spines after burial and fossilization, preserving the iconic star-like design in stone. Size of largest: 3.5″ L x 3″ W x 3″ H (8.9 cm x 7.6 cm x 7.6 cm)

Provenance: private Colorado, USA collection

Condition: Domed fossil in gray matrix is reattached to the stone, with faint breakline along the base / attachment point. White matrix has multiple fossils embedded in it. Yellow fossil is polished and lustrous. Largest has stable fissures across the surface.