We have this bracelet using a salvaged old cut diamond and some antique chain, adding a handmade bezel setting and a modern bolt ring clasp. 
Tested as 9ct gold (rosy in hue) 
Weight approx 3.24g
Diamond 0.20ct approx I1/2 clarity, tested as natural, earth mined diamond. 
Length approx  6 1/2 inches 
Width of chain approx 2.2mm 
Very good antique condition