Opal, ruby and diamond ring, early 20th century

Set with an oval opal, between shoulders millegrain-set with calibré-cut rubies and circular-cut diamonds, size O^1/2.

Shank engraved PLAT to inside for platinum. Black opal with minor scratches to surface through age and wear, measuring approximately 14.5 x 8.5 x 2.5, weighing approximately 1.76 carats, with good play of colour predominately blue, green and orange. Overall good condition. Accompanied by case from P.V. Kragh.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."