Gold - Serra do Caldeirão claims, Brazil
Mineral: Gold
Locality: Serra do Caldeirão claims, Pontes e Lacerda, Alto Guaporé District, Mato Grosso, Brazil
Description: Interesting features on the surface of gold crystals. I cannot say of these minute crystals and spherules, composed by pure gold, are syngenetic with the crystals or a posterior deposition (by bacterial activity for example).