Calcite - Specimen lock 5cmApproximate Weight of 1 piece:

5cmApproximate Weight of 1 piece: 20g

It shows the broad flat faces and sharp angles topaz is known for

Mined from: Sierra De Cruces

giving it the classic bird-like theropod shape associated with Grallator tracks

Ammonites are an extinct form of mollusk that thrived in the seas during the time of the dinosaurs and are related to squid

Calcite - Specimen lock 5cmApproximate Weight of 1 piece:Mined from: Linwood Mine, Buffalo, Scott County, Iowa Description: A striking, one of a kind calcite specimen featuring a dense cluster of sharply formed, blocky crystals elegantly spread across a limestone matrix. This piece showcases classic Midwestern U. S. calcite morphology, with well defined rhombohedral to pseudo cubic crystal habits that create a visually captivating, geometric landscape. The crystals range from transparent to softly