

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
Sunday 9th February
Opening hours during the summer months are Tuesday to Saturday 10am to 5pm. We are open outside these hours by arrangement.
Upcoming Events
Friday 28th March ~ 12:00pm
2025 Gem Talks - second quarter talks will be in Minchinhampton, Quedgeley, Childswickham, Winstone, Tewkesbury, Woolaston, Cheltenham, Willersley, Upton St Leonards, Bentley, Wyre Piddle, Hucclecote, Littleton and Cirencester. 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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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…
“Mr M writes…
My wife loves the pendant, she loves the colour and it looks absolutely great on her. Many thanks for making such a lovely job of it and delivering it in time for her birthday. Please pass on my thanks to all concerned.
“Mr B writes…
It’s nice to be explained things by a fellow geologist!
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