Just Gems sells high-quality, certified diamonds & coloured gemstones, set in fine jewellery. We also offer a selection of rare & unusual natural gemstones which appeal to a discerning clientele.

Just Gems is owned and run by Helen Plumb, a gemmologist of international reputation, who is keen to share her knowledge & enthusiasm for gemmology with those interested in learning more at events. Just Gems was based in Aberdeen, Scotland but has now relocated to Winchcombe, in the Cotswolds.

Spectacular Boulder Opal

Just Gems sells high-quality, certified diamonds & coloured gemstones, set in fine jewellery. We also offer a selection of rare & unusual natural gemstones which appeal to a discerning clientele.

Just Gems is owned and run by Helen Plumb, a gemmologist of international reputation, who is keen to share her knowledge & enthusiasm for gemmology with those interested in learning more at events. Just Gems was based in Aberdeen, Scotland but has now relocated to Winchcombe, in the Cotswolds.

Boulder Opal Stud Earrings in Yellow Gold

Kunzite & Ethiopian Opal Pendant

8.78ct pear cut kunzite, set with 1.42ct pear cut cabochon Ethiopian opal, in 18ct white gold, suspended from 16” 18ct white gold anaconda chain

Paraiba Tourmaline & Diamond Ring in Platinum

4.02ct Oval cut Paraiba type, cuprian elbaite tourmaline set with 0.51ct E colour VS clarity diamonds in platinum

Our Latest News

Sunday 27th May

Pearl Stringing Workshop to be held on Sunday 27th May 10am to 12.30pm, tickets £35.
Helen Plumb of ‘Just Gems’ will show her beautiful pearl collection, talk about pearl gathering and help you select a strand of colourful real cultured pearls, grown in freshwater bivalves. She will guide you through the process to create your very own necklace to take home. Places are strictly limited so book early. https://winchcombefestival.co.uk/event/pearl-stringing-workshop-at-just-gems/

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Upcoming Events

Friday 25th May ~ 10:00am

Helen Plumb will be giving a talk on Coloured Gemstones to the Probus Club of Malmesbury at the Riverside Community Centre, Gloucester Road, Malmesbury. Please contact Rob Symcox (symcox841@btinternet.com) or on 01666 825835, for more information.

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Featured Jewellery

Ethiopian opal ring in 18ct goldWatermelon tourmaline & sapphire pendant in rose & white goldRound emerald pendantBoulder opal, orange & green garnet earrings in 18ct yellow goldWatermelon tourmaline cabochon cufflinks in silverYellow diamond 5 stone cluster ring in 18ct yellow goldMulticolour sapphire & diamond ring in 18ct rose goldRuby & pearl pendant in goldKunzite & opal pendantShamrock pendant in rose goldRubellite & golden diamond ring in goldAmethyst & sapphire pendant in rose & white goldTanzanite & sapphire pendant in 18ct white goldBlack opal and pink sapphire heart ring in platinumGolden pear cut diamond ringKildrummy quartz, brown diamond and pink sapphire pendant in 18ct rose and white goldPink 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.

See Opening Times and Directions

From our customers…

Mrs K writes…

Just to say how delighted I am with all the pieces you have designed for me. My friends have all commented on how lovely they are.

Ms W writes…

We have to say that purchasing such a special ring in this way, was an ultimately personal experience that can not be easily replicated. We were so impressed by your knowledge, passion, enthusiastic and detailed approach providing us with a truly personal service to our purchase and we thank you immensely for that.


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