Unheated sapphire & heart cut diamond ring in platinum

4.82ct cushion cut blue sapphire with Gem & Pearl Laboratory report confirming that the sapphire is unheated, flanked by 0.90ct pair of heart cut diamonds in F colour VS clarity. Gemstones mounted in platinum ring, wedfit. It is rare to find such a sparkling and exquisite unheated sapphire of this quality. Price £17,999

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Saturday 15th November

Opening hours during the winter months are Tuesday to Saturday 10am to 4pm. We are open outside these hours by arrangement.

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Upcoming Events

Saturday 15th November ~ 12:00pm

2025 Gem Talks - second half talks will be in Worcester, Ross-on-Wye, Winchcombe, Cheltenham, Ullenhall, Gloucester, Bloxham, Moreton-in-Marsh, Bromsgrove, Winstone & Witney. We are taking bookings for 2026, please contact helen.plumb@just-gems.co.uk or call 07732 835704 if you would like to book Helen to give your group a talk on Gems they will enjoy and remember. Please check the feedback on our latest talks on the About/Testimonials page of our website.

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Featured Jewellery

Wood opal pendant in palladium & 18ct yellow goldSea green tourmaline & diamond ring in white goldCushion cut unheated sapphire & heart cut diamond ring in platinumPink spinel & cushion cut diamond ring in platinumNatural yellow zircon & diamond pendant in platinumSpectacular aquamarine briolette & diamond pendant in platinumBlack opal ring in 18ct yellow goldTsavorite & diamond cluster ringSapphire & diamond cluster ring in 18ct yellow goldWatermelon tourmaline cabochon cufflinks in silverBlack opal and pink sapphire heart ring in platinumPink sapphire & Tahitian pearl pendant in 18ct white gold

Explore all our Jewellery

The Just Gems Shop

27 North Street, Winchcombe, Gloucestershire

The shop has a wide selection of carefully sourced unmounted gems. If you would like to choose a loose gem in any size, shade or cut, we have a large number of suitable stones just waiting for you! Our gems are collected from personal contacts of Helen Plumb, relationships she has developed over more than twenty years of working with the international gemmological trade. Wherever possible, our stones are ethically sourced and many come from known mines in Brazil, Afghanistan, East Africa, Sri Lanka and elsewhere.

We also love pearls at Just Gems, and offer a matching service to make up earrings, bracelets, pendants or necklaces that will enhance your own pearl jewellery. We restring pearls in our workshop and can replace or repair damaged clasps. Please note that we only mount natural gemstones and restring real pearls (cultured or natural) and gemstones. We do not work with simulants.

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From our customers…

Mrs H writes…

My husband and I recently purchased rings from you for our golden wedding anniversary. The ring designed for me is absolutely gorgeous and such a pleasure to wear, all friends and family think the ring is amazing, it has made a special anniversary even more special, my husband is also thrilled with his wedding ring he says its just made him feel special again! I cannot say thankyou enough. You have made two people very happy with two such special pieces of jewellery. I have recommended you to our friends and family and will continue to recommend you to anyone who asks about my lovely ring. Thankyou so very much, from two very happy customers.

Ms G writes…

I’m delighted to report that my beautiful ring arrived yesterday and all is well! I can’t wait to wear it and to receive all the comments of admiration it must surely attract. I’d like to thank you so very much for ‘busting a gut’ to get this right for me; I know it’s been frustrating but worth it in the end.

Thanks Helen for your patience and professionalism; I feel lucky to have remembered your business and to have found such a lovely item as a result. Hope to do business with you again soon!


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