Our Lady Diana Ring

March 18th, 2011 by James L. Sweaney, CGA, FGA. GG

Royal Ring by Mardon

Royal Ring by Mardon


We’ve just completed this gorgeous sapphire and diamond ring, inspired by the engagement ring of Lady Diana and soon-to-be Lady Kate. This basic design, where a colored gemstone is surrounded by a circlet of diamonds, has been a favorite for centuries. Since everybody and their uncle has been doing versions of the ring, we might as well show off a well made quality piece by Mardon.

We studied the available photos of Lady Diana and Kate Middleton wearing the ring because we wanted to portray the Lady Di design as accurately as possible and get the exact structure and prong layout. It was challenging to keep the overall proportion and look of our ring similar, because we used a smaller sapphire– 3 ct vs the original 12. And where her stone is an oval, ours is similar but slightly different–the classic cushion antique shape often used for fine sapphires. Adjusting the stone sizes for the cluster surrounding the center, we were able get the same number of diamonds. We used a good match of VS quality diamonds, all recycled from estate jewelry!

You can see the gem report for the sapphire in our Gallery of Gems, I-17700. It’s a classic cushion shape, beautifully cut, eye clean, with a vivid velvety medium dark blue color. Although a Ceylon sapphire, the stone has a slightly sleepy appearance the softens its look, reminiscent of Kashmir sapphires. We think this stone is richer in color– the Lady Di sapphire seems bit dark, as you can see from the photos. We’ve surrounded it with over a carat of dazzling VS clarity diamonds of G to H color and set the gems in solid 14K white gold.

Princess Diana and Prince Charles wedding rings

Princess Diana and Prince Charles wedding rings

Kate Middleton's engagement ring

Kate Middleton's engagement ring

Kate showing the ring

Kate showing the ring

Based on our experience making jewelry, and seeing just how the royal ring was put together, we produced two separate components, the gem cluster and the ring shank/underbezel, on our new digital rapidprototype CAD/CAM system. Then

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