

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…
“Professor H writes…
The turquoise pendant for my daughter arrived safe and sound and is spot on - again my sincere thanks.
“Mrs K writes…
Morning Helen - I took delivery of my rings yesterday. I just can’t believe that my Grandmother’s ring is the same one - it looks absolutely stunning! I hadn’t realised it had all those diamonds in it and the sapphire is such a beautiful shade of blue and all the work that has been done is excellent - thank you so much! My opal ring look identical and to my untrained eye I can’t tell the difference between the original stone and the new one, its like having an old friend back! The previous stone certainly took a whack looking at the crack on it! Anyway thank you once again, regards
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