Charlotte of Mecklenburg-Strelitz (Sophia Charlotte; 19 May 1744 – 17 November 1818) was Queen of Great Britain and Ireland as the wife of King George III from their marriage on 8 September 1761 until the union of the two kingdoms on 1 January 1801, after which she was Queen of the United Kingdom until her death in 1818. As George's wife, she was also Electress of Hanover until becoming Queen of Hanover on 12 October 1814, when the electorate became a kingdom. 

 

The Arcot diamonds consisted of five brilliants, out of which only the first two were of significant sizes, and were antique oval or pear-shaped, colorless or near-colorless diamonds with the larger one having a weight of 33.70 carats and smaller one 23.65 carats. When the diamonds were presented to Queen Charlotte by the Nawab, they were set on a matching pair of earrings, as the diamonds appeared to match each other in terms of size and shape, even though their weights were different. Queen Charlotte was famous for superbly bejewelling herself while at court or for formal state occasions. The portrait of Queen Charlotte below show her wearing drop earrings, and hair ornaments with at least two drop-shaped diamonds and a collar brooch with at least three drop-shaped diamonds. If the pair of drop earrings she is wearing is not what the Nawab of Arcot had gifted, from among the remaining five drop-shaped diamonds, two of them might be the pear-shaped Arcot diamonds gifted by the Nawab