Charming small portrait pendant of the young Princess Mary of Great Britain (5 March 1723 – 14 January 1772).
She wears a blue ermine trimmed mantle, her upswept hair adorned with a pink rose.
Oil on vellum, oval 3cm (1 in.) high.Gold mount,and rock crystal.
 
Princess Mary was born at Leicester House, Westminster, London, the second youngest daughter of the future King George II. Her mother was Caroline of Ansbach, daughter of Johann Friedrich, Margrave of Brandenburg-Ansbach.
Her father succeeded, as George II, on 11 June 1727, and she became "HRH The Princess Mary".  Queen Caroline entrusted Mary to her elder sister Caroline, urging her to "do what she could to support the meek and mild disposition of Princess Mary".
A marriage was negotiated with Landgrave Frederick of Hesse-Kassel, the only son and heir of William VIII, Landgrave of Hesse-Kassel.
They married by proxy at the Chapel Royal of St. James's Palace in London on 8 May, then in person on 28 June 1740 at Kassel.They had four sons, three of whom survived to adulthood.
The marriage was unhappy, and Frederick was said to be "brutal" and "a boor". Frederick reportedly subjected Mary to spousal abuse. In late 1746, Mary made an extended trip to Britain to escape his maltreatment. The couple separated in 1754 on Frederick's conversion to Roman Catholicism. She was supported by her father-in-law, who provided her with a residence in Hanau, as she did not wish to return to Great Britain, but to stay on the continent to raise her children.
In 1756, Mary moved to Denmark, to take care of the children of her sister Louise of Great Britain, who had died in 1751. She took her children with her, and they were raised at the royal court and her sons were married to Danish princesses. 
Mary died on 14 or 16 January 1772, aged 48 at Hanau, Germany.