SAPPHIRE AND DIAMOND RING AND DIAMOND BROOCH, JOHN DONALD, 1960s

The ring of abstract design centring on a mixed-cut sapphire, accented with brilliant-cut diamonds, size H½, sizing beads, British hallmarks for London, 1968, maker's marks JAD for John Donald; together with a brooch  set with brilliant-cut diamonds, British hallmarks for London, 1967, maker's marks JAD, case John Donald jeweller & goldsmith, 120 Cheapside, London, E.C.2.

Ring: Stamped 18 for 18 carat gold. British hallmarks for London, 1968, maker's marks JAD for John Donald. Sapphire measuring approximately 11.2 x 8.5 x 6.4mm, a very light violetish blue, nicks to girdle, small chip, typical inclusions visible with magnification. Estimated total diamond weight approximately 0.60 - 0.70 carats, bright, lively stones. Scratches to band consistent with wear. Brooch: Stamped 18 for 18 carat gold, British hallmarks for London, 1967, maker's marks JAD. Estimated total diamond weight approximately 1.80 - 2.00 carats, bright, lively stones. Tarnished, could benefit from a careful professional clean. Weighing approximately 22.4 grams. Rotating safety catch. Both pieces in good condition.
"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 and to the Notice regarding import of Burmese jadeite and rubies into the US.
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."

John Donald is an innovative British jewellery designer and was particularly prolific in the 1960s.  He studied illustration at Farnham School of Art and later Silver & Jewellery at The Royal College of Art, London.  His contemporary designs included more fluid jewels with movement and often were essentially organic in form.  He would often combine gold wire work with precious stones and natural crystals.