This extraordinary topaz was presented to Frances Anne, Marchioness of Londonderry, by Tsar Alexander I in 1821. The stone formed part of a graduated suite of pink topazes worn by Lady Londonderry on the front of her robes for the coronation of King William IV in 1830. This remarkable set of stones can clearly be seen in the portrait of Lady Londonderry painted by Alexandre-Jean Dubois-Drahonet to commemorate the occasion (now on loan to the Victoria and Albert Museum in London).
The stone was later remounted into
a pendant by the Crown jeweller Garrard & Co.