Platinum and Diamond Solitaire, prong-set with an old cushion-shape faceted diamond weighing 5.69 cts, flanked by baguettes, size 5 1/4, (with ring guard).
J or I color
uneven cut, very small table, wavy girdle
11.86 x 11.00 mm across the belly (not diagonally)
table aprox. 4.90 and 5.31 mm
table % in the low 40%s
crown height is about 2.6 mm
Crown angle looks to be around 34 to 35 degrees