Keystone,1.5,Excellent,G,VS1,F254602
https://www.igi.org/viewpdf.php?r=414088986
https://www.igi.org/viewpdf.php?r=414088986
Description
https://www.igi.org/viewpdf.php?r=414088986
https://www.igi.org/viewpdf.php?r=414088986
https://www.igi.org/viewpdf.php?r=414088986
https://www.igi.org/viewpdf.php?r=414088986