Cf. Momin Latif, Mughal Jewels, exhibition organised by Societé Général de Banque, Brussels, 1982, page 140.

Though the above emerald is not a particularly early example of the Indian carvers art, it is without doubt one of the largest examples known. In this case the combination of the exceptional size coupled with its attractive colour and semi translucency makes it rare. Given that emeralds grow in the form of a hexagonal prism, the shape of this pendant points towards the original crystal being exceptionally large. A cross-section of the famous Patrizius emerald of 650cts. in the American Museum of Natural History would not be as big as the present stone. The Al-Sabah Collection in the Kuwait National Museum contains an emerald of hexagonal form weighing 398cts. as well as a bead of 235cts. while in the Crown Jewels of Iran there is a hexagonal emerald estimated to weigh 250cts. and an emerald bead of 303cts.
The present emerald of 379.80cts. originally formed part of an important European collection, in which it has remained for about a hundred years.