These are 9ct Double Halo 0.25ct Diamond & 0.40ct Emerald Stud Earrings.
 
Cut: Brilliant
Carat (TCW): 0.25ct
Colour: G/H
Clarity: Si
Gemstone: Emerald
Gemstone Carat (TCW): 0.40ct
Diameter: 8.0mm
Gemstone Size: Diameter: 3.3mm
Fastening: Butterfly