I came upon a rather interesting statement in the Daily Telegraph & Courier, dated Jul. 8, 1880. An individual wrote the following to the editor of The Daily Telegraph:
"Sir- Will you allow me to make public, through your columns, that a friend of mine has found on the scene of the massacre, and close to the remains of an officer, a mourning ring, set with seven small rosette diamonds, and inscribed "In Memoriam," &c. Any one claiming the ring, and able to supply the initials and date on the inscription, may apply to P. Dods, Lieut. -Colonel. C. United Service Club, Edinburgh, July 6.
Lieut. Col. P. Dods is listed in The Army List for 1879 as a Lieut. Col. of the Indian Staff Corps, retired on full pay with date of rank Feb. 17, 1872.
We have reports of two rings being found on the Isandlwana battlefield.
From Historical Records of the 24th Regiment from its Formation in 1689:
"Many months afterwards a diamond ring was picked up on the field of Isandhlwana. By means of an advertisement, the finder was enabled to identify the ring as having belonged to Captain Mostyn, and restored it to that officer’s family."
From Lieut. Maxwell's Reminiscences...
"Colonel Degacher claimed a valuable ring from me which he said he believed had belonged to his brother, who was killed in action. He would send it home to the widow, and in the event of its not being so, would return it to me, or otherwise let me know. Whether it was his brother’s or not, I am not aware, as he failed to inform me. I also obtained from the same source a valuable diamond ring, claimed by Sub-Inspector (F. L.) Phillips N.M.P., and valuable papers both official and otherwise, which found their way through me into the hands of those they belonged to."
Obviously impossible to know for certain, but did any of the Imperial Officers suffer the loss of someone close to them? Someone close enough to prompt them to wear a memorial ring on a combat deployment. I can't find any info on Capt. Mostyn's family, but he seems like the best candidate.