This is a 18ct Heart Shaped 0.50ctw Diamond Dress Ring. 
 
Available in ring sizes H, J, K, L, M, N, O and P
Ring sizing is also available upon request.
 
Cut: Princess
Colour: G/H
Clarity: Si
Cut 2: Brilliant
Colour 2: G/H
Clarity 2: Si
Head Size: 8.9 x 8.6mm