I'm not really a believer in all these symbols being messages, but the OP said 17 stones and there are. as you said there are 16 diamonds around the cuff link, there is also a center stone which makes it 17. As far as the fingers, the index is not prominent, so I can see calling it 3 fingers. There is a 0 and a 2 on the page. Not saying it is a message. Just saying OP could be considered correct in observation.