Calcite - Specimen lock The proper name for this

The proper name for this process is called "agatized coral" or "agatized fossil coral

Mined from: Sierra De Cruces

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

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

Blue Lace Agate

Calcite - Specimen lock The proper name for thisMined 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