For roughly two millennia, India was the only known source of diamonds in the world. The stones that shaped global jewellery standards — the ones that passed through the Golconda trading region into European and Mughal courts — were Indian alluvial stones, hand-gathered from riverbeds in what is now Andhra Pradesh and Telangana.
The cutting traditions that produced Old Mine geometry grew from this supply. The craftsmen working on these stones did not have electricity. They worked by hand, under candles and oil lamps, developing proportions and facet placements that returned the most light in amber, directional, warm illumination. The geometry they arrived at — high crown, small table, open culet, approximately 58 facets in an imperfect square — was not derived from mathematical models. It was derived from experience. From looking at finished stones under actual light, for decades, across generations of workshop knowledge.
When Brazil began producing diamonds in the eighteenth century and South Africa in the nineteenth, the Golconda supply declined. But the Old Mine cutting tradition had already traveled, embedded in the workshops of craftsmen who had spent generations working Indian rough and building technique around its specific character.
The irregularity that defines Old Mine cuts — the asymmetric facet placement, the varying table sizes, the imperfect squarish outline — was not a product of limited skill. It was a product of hand-finishing without calibrated machines, guided by eye and experience. Each departure from uniformity records a decision made by a cutter judging the stone in the light it would actually be worn in. A perfectly symmetric Old Mine cut would be a contradiction — and it would look like one.
In India, jewellery is not simply owned. It is inherited, reset, and worn again across generations. The Old Mine cut carries this understanding in its proportions: it was designed to be beautiful in the conditions of human life, not the conditions of a gemological laboratory.