Ring size: USA 8.75, UK Q ½, EU 58.5 (complimentary resizing available)
Materials: natural no heat ceylon sapphire (GIA report 5211792482), natural earth-mined diamonds, solid 18k yellow gold (unmarked; tested with electronic gold tester and nitric-muriatic acid)
Weight: 5.8 grams
Workmanship origin: most likely Italian
Dimension of ring head: 18 x 12.3 mm
Dimension of sapphire: 6.9 x 4.9 mm (approx. 1 ct)
Dimension of diamonds: twelve total (11 table cut, 1 rose cut; measured in mm): one 2 x 1.6, two 3 x 2, one 2.25 x 2, one 2.4 x 2, one 2.6 x 2.25, one 3.2 x 1.6, two 2.2 x 2.2, one 2.4 x 1.6, one 2.6 x 2 (rose), 2.2 x 2 (approx. 0.59 ctw)
Condition: the back of the shank shows evidence of later resizing (my jeweler will rectify any flaws in appearance when he resizes for you). Enamel to carved shoulders nearly all gone. Tarnish to diamond silver foiling. One of the halo diamonds is a rose cut, and is possibly a historic replacement (the stone features a pointed high crown, a feature of historic rose cuts). Due to age-related wear, the halo diamonds are imperfect: under loupe magnification, facet junction abrasions, tiny corner chips, pin-sized nibbles are present. No chips to the original sapphire, but under magnification, facet junction abrasions are present.