Grey Chalcedony Faceted Bar .925 Silver Bezel Pendant 1 ring Charm. A calibrated Grey Chalcedony exhibits a slightly violet Grey body with good brilliance and is translucent with a vitreous luster on a well made symmetrical body.925 Silver Bezel Pendant 1 ring Charm. A calibrated Grey Chalcedony exhibits a slightly violet Grey body with good brilliance and is translucent with a vitreous luster on a well made symmetrical body.