Ann, here are other views of the ones with green and brown ribbons. I held them in direct sunlight, even looked at them with my lupe. But I honestly can't get oxblood out of them.... but maybe you could.
http://www.carolinefentonphotography.com/Albums/FENTON-MARBLES/i-LgqG6tP
http://www.carolinefentonphotography.com/Albums/FENTON-MARBLES/i-qHZX2n5
http://www.carolinefentonphotography.com/Albums/FENTON-MARBLES/i-nLLdGQg
http://www.carolinefentonphotography.com/Albums/FENTON-MARBLES/i-dDz8bML