

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
Our Latest News
Thursday 2nd April
To celebrate 20 years of trading, Just Gems is having a SALE. There is 50% off certain pieces of jewellery. Search on SALE in Design drop down on our jewellery page.
Upcoming Events
Thursday 2nd April ~ 12:00pm
2026 Gem Talks - second quarter talks will be in Droitwich, Henley-in-Arden, Aston & Cote, Hook Norton, Longford, North Woodchester, Minchinhampton, Shutford, Cradley, Abberley, Avening, Upton St Leonards & Charlton Kings. We are taking bookings for the first quarter of 2027, 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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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.
See Opening Times and DirectionsFrom our customers…
“Mrs P writes…
Thank you for your fascinating (and informative) talk last evening. I think it was quite obvious that everyone was listening with huge interest and keen to talk to you afterwards. I suspect that your audience would have been much happier if I’d ditched the business session and allowed everyone to continue to ask you questions - I hope you weren’t too hoarse this morning.
“Mrs B writes…
I lost my engagement ring. I had often walked past ‘Just Gems’ in Cults, Aberdeen but following the loss, I decided to have a look in the shop window to see if there was any ring on show similar to mine. Although the shop was officially closed, Helen welcomed me into the shop to discuss what I required.
It was immediately apparent that Helen was an expert and knew precisely what I was looking for. She showed me stones which would have been good replacements but she thought she could do better if I could wait. Following a trip to Burma, Helen phoned to say that she had sourced stones which she thought would suit me. I was not disappointed. We discussed the design of the new ring and she was able to show me a computer simulation of what the final ring might look like.
I was thrilled with the ring when it arrived after a few weeks. It is almost identical to the ring I lost. I could have gone to high street jewellers and bought a ring similar to the one I lost but I was pleased that I went to Helen Plumb at Just Gems. There I got excellent service from someone who obviously knew her business. The workmanship on the ring is first class and my ring has been admired by many.
It is a pity that Just Gems is moving south but what is Aberdeen’s loss will be the Cotswolds gain. We wish her all the best for a successful business in Winchcombe.
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