Vintage Italian Checkerboard Cut Blue Topaz Ring in 18k yellow gold

Vintage Italian ring featuring a checkerboard faceted blue topaz stone bezel set on a high polish 18k yellow gold band.  ID#: RG997 Blue Topaz: One (1) bezel set, checkerboard facet, square cut blue topaz stone measuring approximately 11.9mm x 11.7mm x 5.9mm.  Metal: 18k yellow gold  Size: 7 1/2 Band Width: 4.07mm  Weight: 10.28g Markings: '750' '1573 MI' (Italian maker's mark', Illegible brand stamp)