For two thousand years, the island of Ceylon has produced the finest sapphires on earth. This is what to look for, and why it matters.
Ceylon is the historic name for Sri Lanka, and it remains the name the trade uses for the island's sapphires. Most are recovered from the alluvial gem gravels, known locally as illam, in the river valleys around Ratnapura, the City of Gems, in the island's south-west.
These gravels have been worked by hand for centuries. Origin is not a marketing claim: it is a measurable characteristic that a reputable laboratory can attribute from a stone's inclusions and trace elements. Ceylon is the reference standard against which fine blue and fancy-colour sapphires are judged.
Most sapphires sold today have been heated. Heat treatment deepens colour and clears silk, and it is permanent and widely accepted, but it is a human intervention. A stone described as unheated has never been treated. Its colour, and the fine internal silk that scatters light through it, are entirely the work of geology.
Unheated stones of good colour are considerably rarer, and are valued accordingly. Because heat cannot be undone or seen with the eye alone, the distinction only means something when it is confirmed on an independent laboratory report. The house deals in unheated Ceylon stones, and states the treatment of every stone in full.
Ceylon sapphire is not a single colour. It runs from the coveted cornflower and royal blues through yellow, pink, and violet, to the rarest of all, the pink-orange padparadscha, named for the lotus flower. Some stones change colour under different light; a few show a six-rayed star.
The silk is a fabric of microscopic needles within the stone. In fine Ceylon material it is what gives the colour its glow, rather than clouding it. Held to morning daylight, a good stone reveals its silk in the table.
A serious stone travels with an independent report from a recognised gemmological laboratory, such as GRS, SSEF, Gübelin, GIA, or GGTL. The report states the species, the weight and measurements, the country of origin, and whether the stone has been treated.
The house discloses all of it, in plain terms and without omission. Origin, treatment, and certification are documented at the cutting stage and shown before any decision is made. A collector should be able to verify everything that is said about a stone.
Ceylon at the source. Every stone its own record.
