Antique 18k Rosy Gold Platinum Oval Cabochon Persian Turquoise Diamond Halo Ring

Here we have a very lovely antique turquoise and diamond ring that was crafted in solid 18k gold with a platinum top during the Victorian era. It features a fine, Persian, oval cabochon cut turquoise stone neatly set at its center. The natural stone has a super attractive robin's egg blue colour, and is wonderfully complemented by a halo of 18 old rose cut diamonds, adding a glamorous touch with their brilliant sparkles. This ring remains in all original and very good  physical condition with patina intact in which gives this piece its wonderful rosy yellow gold appearance. It is ready to wear upon arrival and will easily stand out with its fine stones and simple design. 
Material:    Solid 18k Rosy Yellow Gold w/ Solid .900 Platinum Halo
Weight:    4.80 Grams
Stone(s):    (1) Natural Turquoise - Oval Cabochon Cut - Multi-Prong Set - Robin's Egg Blue Colour - 13.80x10.25mm (approx.)
(18) Natural  Diamonds - Old Rose Cut - Pave Set - F/G Colour - VS2/I1 Clarity - 0.80ctw 
Total Diamond Weight:    0.80 approx.
Ring Size:   UK O1/2,  US7.5 sizable
Ring Width:    18.35mm x 14.45mm 
Ring Height:    8.7mm rise