Buy rough stones from Ethiopia – untreated rough material for self-grinding: raw Welo opals and raw chalcedony, both directly from the mining sites in Ethiopia.

The rough opals offer the full play of colors but are more challenging to process. Raw chalcedony, with a Mohs hardness of 6.5 to 7, is significantly more forgiving, making it the ideal material for your first cabochon.

All stones are 100% natural and untreated. I show you step-by-step how to go from a rough stone to a finished cabochon in my grinding guide.

Free shipping within Switzerland, 10-day return policy.