Cerro del Mercado mine, Durango Mexico
Specimen size: 4×3.3×2 cm
Description: A 3.2×1.5 cm green-yellow crystal is intergrown with a breccia-matrix containing quartz, calcite, apatite fragments and pyroxene partly replaced by yellow nontronite. The transparent crystal has a good lustre but also many internal fractures. It is mounted on a wooden base.
Can you name this gem?