Ring features a 3.5 carat London Blue Topaz center stone with 1/8 carat diamond halo. Band and mounting are 14 kt white gold. Ring was size 7 at the time of original purchase but was later professionally resized to a 6. Center stone is 12mm tall and 10 mm wide. Excellent pre-owned condition. Stones are all natural (although most topaz is heat treated). First photo is a stock photo. The remaining photos were taken by me of the actual item. The photos (taken by me) really do not do this beautiful ring justice!