This is a 9ct White Gold 1.77ct Oval Blue Topaz & 0.17ct Diamond Pendant.
Cut: Brilliant
Carat (TCW): 0.17ct
Colour: G/H
Clarity: Si
Gemstone: Topaz
Gemstone Cut: Oval
Gemstone Carat (TCW): 1.77ct
Width: 9.6mm
Length: 22.0mm
Gemstone Size: 6.7 x 8.6mm