Too bad they stuck the blue in here - it would have been a wonderful Christmas pin. Well, it still can be. The foiled marquise cut faceted and prong set stones are 5/8 inches long and there are ten of them. That big middle stone? 3/4 x 1/2 and open backed. Foil is a bit worn on only 2 stones (seen only with loupe on back. Deep, rich colors, no dings. See last image for a VERY similar necklace.