CHRYSO-R-01 Origin: Peru Grade: A Dimensions: 10-20g - Approximately 30-35mm 20-30g - Approximately 35-40mm 30-40g - Approximately 40-50mm Origin: Peru Grade: A = good Tumbled chrysocolla stone from Peru Sold individually. Weight options from 10-20g to 30-40g Shapes and colors may vary from one stone to another. Chrysocolla has been known since ancient times. Hippocrates, the founding father of medicine (460-377 BC), highlighted the medicinal virtues of this stone. He recommended it for eye problems or in the healing of certain wounds. In 315 BC, the famous Greek philosopher Theophrastus precisely described it in his work titled "Treatise on Stones."