Wander00,
The Cloudsley Shovell referred to seems to have been an expensive ornament to the Navy:
...Scilly naval disaster of 1707 - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Scilly...saster_of_1707
Sir Cloudesley Shovell, (1650–1707). Oil by Michael Dahl. The Scilly naval disaster of 1707 was the loss of four warships of a Royal Navy fleet off the Isles...
Wasn't there an "Antiques Roadshow" some time ago on which a ruby ring appeared, probably having been robbed from the finger of Sir Cloudsley when his corpse was washed up on a local beach ?
Danny.