Setting
14k white gold 
Post and clasp backing
Bezel set opals and moissanite
Prong set accent stones
Gemstones
6x Australian Coober Pedy Opals 
Calibrated pear shape 
Blue, green and pink colour 
Approximate carat weight (opal): 0.29ct 
20 brilliant round moissanite 
VVS1, colourless D grade stones 
Approximate carat weight (moissanite): 0.72ct
Measurements
12.4mm (bottom to top) x 7.55mm (left to right)