The Nassak Diamond is a large, 43.38 carats (8.676 g) Golconda Diamond that originated as a larger 89 carat diamond in the 15th century in India. Found in Golconda mines of Kollur and originally cut in India, the diamond was the adornment in the Trimbakeshwar Shiva Temple, near Nashik, in the state of Maharashtra, India from at least 1500 to 1817. The British East India Company captured the diamond through the Third Anglo-Maratha War and sold it to British jewellers Rundell and Bridge in 1818. Rundell and Bridge recut the diamond in 1818, after which it made its way into the handle of the 1st Marquess of Westminster's dress sword.
Munich, Germany's Reich der Kristalle museum replica of the 1820s Rundell and Bridge recut of the Nassak Diamond. In reality the diamond was nowhere near this blue, being a white Type IIa classic Golconda diamond. The term "blue-white" is often used to describe these diamonds but in reality alongside a modern D-color diamond it would have had an extremely faint blue cast. Its cut was also more complex (see below images).
Trimbakeshwar Shiva Temple in Nashik, India
Golconda diamonds are mined in the Godavari-Krishna delta region of Andhra Pradesh, India. Golconda Fort in the western part of modern-day Hyderabad was a seat of the Golconda Sultanate and became an important centre for diamond enhancement, lapidary, and trading. Golconda diamonds are graded as Type IIa, are formed of pure carbon, are devoid of nitrogen, and are large with high clarity. They are often described as diamonds of the first water, making them among history's most-celebrated diamonds. The phrase "Golconda diamond" became synonymous with diamonds of incomparable quality.
Sindbad the Sailor and the Valley of the Diamonds, illustrated by Maxfield Parrish (1870–1966)
A scene of Machilipatnam port in 1676 AD, it was a prime seaport of Golconda Sultanate
Diagram of the pre-1852 cut Koh-i-Noor. Fig I. The shaded area is the base. Fig II. A: flaw; B and C: notches cut to hold the stone in a setting; D: flaw created by fracture at E; F: fracture created by a blow; G: unpolished cleavage plane; H: basal cleavage plane. Fig III. The opposite side shows facets and peak of the "Mountain of Light"
Women in the process of washing earthy substances from soil, at a site of an unnamed Golconda mine.
