14KW Aquamarine, Sapphire, and Diamond Bubble Pendant on an 18.75" Chain
 
Aquamarine - 4.5mm, 2-3.0mm 
Sapphire - 3.0mm, 2.7mm
Diamond - 10 = .23 carat total, SI2 G/H, Precision Cut
Chain - 14KW Cable Chain, 18.75