Sterling Wrapped Ford Stone (?) Pendant Square Beaded Necklace

Very pretty pendant necklace. Stone wrapped in Sterling Silver. Sterling is marked with 925. I'm not exactly sure what the center stone is... but maybe a .... Chert Breccia? / Ford Stone? It feels like a polished stone. Smooth to the touch. Measures 18 1/2" from one side to the other. Stone measures approximately 2 1/2" from top of the stone to the bottom and about 2" from side to side at the widest. PR230702. 2. Size: Womens OS Condition: Pre-Owned Like New Excellent preowned condition.