On the first picture, I think (though I am not totally sure) that the earrings could be Queen Victoria’s Diamond Stud Earrings:
There could be another possibility, suggested by the website ‘From Her Majesty’s Jewel Vault’: a pair of large solitaire earrings made by Queen Mary in 1911 by removing two diamond collets from Queen Victoria’s Coronation Necklace (as mentioned by Hugh Roberts in The Queen’s Diamonds, page 52):
On the second picture, I guess that these earrings are ‘The Queen’s Pear Drop Earrings’ mentioned in Leslie Field’s The Queen’s Jewels. Field writes that “These modern, gold-set diamond stud earrings with large pear-shaped drops were made from family stones”. The Queen loaned them occasionally to Diana, Princess of Wales, for official visits in the Commonwealth or abroad.
(pictures: From Her Majesty’s Jewel Vault; Gracie Jewellery)
--Previous Message-- : Can anyone help me to identify the earrings in : these 2 pictures? : : Both sets are worn with HM's "best : diamonds" (the South African 21st : Birthday set) : : : : : : Thanks in advance for your assistance. : : Cheers! : Bryce : : :