The round cut and square/princess cut are 5mm x 5mm (1/2 carat each, 1 total weight) cubic zirconia with gold plated sterling silver.
The round dangley ones I think are gold plated brass, about an inch long
The earrings with the 3 round stones at the top (the earrings at the bottom of the picture) are white sapphire with cz accents
$10 each