The Mughal-Cut Diamond — Historic Indian Lapidary Form
The Mughal-Cut Diamond — Historic Indian Lapidary Form
Diamonds polished in the Mughal style with large tables, minimal faceting, and weight-retentive geometry, often retained on important historic stones
The Mughal-cut diamond is a diamond polished in the Mughal cutting tradition, characterised by large flat table facets, minimal additional faceting, and an outline that follows the natural shape of the original rough crystal. The cutting style was used in India from approximately the sixteenth through the nineteenth centuries, principally during the Mughal Empire (1526 to 1857) but persisting into the early colonial period. Many of the most important historic Indian diamonds — stones from the Golconda mines of central India, including some of the world's most famous gems — retain their original Mughal cuts and are valued today for both their gemological character and their historical significance.
Form and proportions
A typical Mughal-cut diamond presents as a relatively shallow, wide stone with a large polished table dominating the crown. The pavilion below is polished but with minimal additional faceting, often consisting of just two or three large planes meeting at the culet. Crown facets, where present, are typically eight in number — four corners and four sides — surrounding the central table. The girdle is irregular, conforming to the natural rough rather than being polished to a calibrated outline. The overall geometry is closer to a step cut than to a brilliant cut, and the stone returns light from the table principally through specular reflection rather than internal-reflection optics.
The proportions reflect the Indian cutting tradition's prioritisation of carat weight retention over brilliance optimisation. A typical Mughal cut retains 60 to 80 per cent of the original rough weight, against 30 to 50 per cent for a modern brilliant cut on comparable rough. The economic and symbolic premium placed on weight retention in the Mughal jewellery tradition supported the long persistence of the cutting style despite the development in Europe of more optically optimised forms.
Historic Mughal-cut diamonds
Several of the most important historic diamonds carried Mughal cuts at the time of their entry into the European and British royal collections. The Koh-i-Noor diamond, mentioned in Persian and Mughal sources as one of the most important stones in the Mughal court, was presented in its Mughal cut at the time of its acquisition by the British Crown in 1849 following the Anglo-Sikh wars. The stone was subsequently recut in London in 1852 under the supervision of Prince Albert into a more European brilliant form, losing approximately 40 per cent of its weight in the process. The decision was controversial at the time and remains so in the broader connoisseurship of historic diamonds.
The Daria-i-Noor diamond, held in the Iranian Crown Jewels, retains its Mughal cut and is one of the largest and most important Mughal-cut diamonds extant. The Nur al-Ain diamond, also in the Iranian collection, is another important example. The Hortensia diamond in the French Crown Jewels and the Shah diamond in the Russian Diamond Fund both carry historic Indian cuts that reflect the broader Mughal-cut tradition.
Beyond these named historic stones, numerous smaller Mughal-cut diamonds are held in museum collections and private collections, often with documented provenance reaching back to specific historical figures or events. The Al Thani Collection, the Khalili Collection, and the Royal Collection Trust all hold significant Mughal-cut diamonds that anchor the contemporary connoisseurship of the form.
The Golconda connection
Most Mughal-cut diamonds were sourced from the Golconda diamond mines of central India, which were the principal historical source of large diamonds in the world before the discovery of the Brazilian and South African deposits in the eighteenth and nineteenth centuries respectively. The Golconda mines produced diamonds of exceptionally high quality, often Type IIa with very low nitrogen content and exceptional colourlessness, and the combination of fine rough and the Mughal cutting tradition produced a body of historic diamonds that retain a distinctive character even today. The term Golconda in the contemporary trade refers as much to this combination of rough origin and historic cutting style as to the specific geographical source.
Recutting and preservation
The question of whether to recut historic Mughal-cut diamonds to modern proportions is a recurring and consequential debate in the high-end diamond trade. Recutting can substantially increase the brilliance and per-carat value of a stone but at the cost of weight, historical character, and provenance documentation. The contemporary consensus in the most sophisticated end of the market favours preservation of the original Mughal cut wherever possible, with recutting reserved for cases where the original cut is severely damaged or where the stone's historical significance does not depend on the cut form. The Koh-i-Noor recut of 1852 is now generally regarded as a regrettable loss of historic character, and similar recuts of comparable historic stones would be unlikely to be supported by the contemporary trade.
In the trade
For Skyjems and the broader trade, Mughal-cut diamonds are encountered principally as historic stones in the antique and estate diamond market. Genuine period stones with documented provenance command substantial premiums, often multiples of the per-carat value that the same diamond would receive if recut to modern proportions, reflecting the collector premium for historical character. The category is small but consequential, and the cut form is one of the most distinctive products of the historical Indian lapidary tradition.