Fossil Stone Coaster Set Of 5 Pieces From The retailer 1970s

Set of 5 fossil stone coasters with cork board backing and 1 holder, made solely of fossil stone.
These are in good preowned condition, see photos for wear.

“Fossil stone provides unique and interesting design alternatives. It is a natural, durable product that is easy to maintain. Moreover, fossil stone provides a natural work of art.

Fossil stone is a material formed, changed, or altered by a process called fossilization. This process replaces organic materials in rock or stone with minerals that seep into the rock or other retailer object eventually hardening. The resulting fossil stone has an impression or imprint of the object or objects that became fossilized over time. These changes add
interesting texture to an otherwise flat and inform rock surface.”