Millions of years in the making. Weeks in the cutting. Yours for a lifetime.
Ethiopian opals form in the Welo region — a highland plateau about 500km north of Addis Ababa. Millions of years ago, volcanic activity forced silica-rich groundwater into cavities in the basalt rock. As the water slowly evaporated over geological time, it left behind tightly packed spheres of silica — and it is the arrangement of those spheres that diffracts light into the fiery play of colour that makes opals so extraordinary.
Unlike the Australian sedimentary opals found in the desert, Ethiopian opals are volcanic — they tend to be more hydrated, which gives them a different kind of brilliance. The best Ethiopian specimens show colour in every direction you turn them.
After rough opal is extracted, it travels to workshops in Addis Ababa where lapidary workers — most of them women — shape, grind and polish each stone by hand. This process takes between one day and several weeks depending on the complexity of the cut. Woman of the Nile works directly with these cooperatives.
Our grading system considers colour play (how many spectral colours appear and how vivid they are), brightness (how strongly the colour shows in indirect light), pattern (rolling flash, pinfire, harlequin), body tone, and transparency. Museum Grade is reserved for stones with exceptional colour play across the full spectrum.
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