Working my way through a large collection of marbles and am gaining some knowledge - especially with the help on this site!!! Tried picturing these and "googling", but nothing comes close. Two on the left are similar (pale green leaning to aqua base) - one on the right is slightly different green/aqua and the red is nearing oxblood. Thank you so for looking!
p.s. Special thanks for the great post on seams and cutlines!!! so helpful for me.