Eight Turquoise Chip Vintage Buttons Various Sizes #MV-16
The four largest buttons that match are 1-1/8" in diameter and set in brass. The next largest one is 3/4" and set in silver. One is 5/8", set in silver with blue turquoise, not green or blue-green. One that is 9/16" and more domed, with a darker area; that button may be older? The smallest one is 5/16" diameter and has a longer shank, a silver setting, with blue turquoise, arranged perhaps to look like a paw or flower. $135 for the set of eight. They're in excellent condition.
Our U.K. supplier says "I researched a little while ago and found out that the turquoise chip technique goes back to ancient times. When archaeologists found ancient settlements in the Ganges delta they found some evidence of this. Turquoise is found inland from the Silk route and presumably was traded along there with the red coral from the Mediterranean region.