1-3/16" is a big size for the Rose, and that pattern is more collectible than the geometric or lined China's. If you meant 13/16" that's still a good size. Good luck with the split, hope you find something amicable with your partner
Is there a pattern on the other side? Other than the black mark (middle of first pic) is there any other damage?
The lined one to the right must be a good diameter as well.
Since value is so subjective, maybe one guy gets the Rose, the other guy gets to keep the other two marbles? Although at 1-3/16" diameter, I'd guess the Rose would be in the 3 digits to the right buyer at Auction.