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 has been serving the Cotswolds since 2017 and has become a favourite visitor destination in the idyllic town of Winchcombe.

Large Sapphire & Diamond Ring

11.47ct cushion cut Sri Lankan sapphire set with 1.13ct triangular diamond pair, diamonds G colour VS1 & SI1 clarity, in 18ct white gold. POA

Ruby & Diamond Ring

3.03ct ruby from Mozambique (independently certified to be unheated) set with a 1.00ct pair of heart cut diamonds (GIA certified D & E colour SI1 clarity), in 18ct rose gold and platinum. POA

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 has been serving the Cotswolds since 2017 and has become a favourite visitor destination in the idyllic town of Winchcombe.

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 has been serving the Cotswolds since 2017 and has become a favourite visitor destination in the idyllic town of Winchcombe.

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

Saturday 21st March

Our shop is closed during the current health crisis but we are providing a mail order and delivery service

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Featured Jewellery

Amethyst & diamond ring in goldYellow diamond 5 stone cluster ring in 18ct yellow goldWood opal pendant in palladium & 18ct yellow goldKunzite & opal pendantRubellite & golden diamond ring in goldShamrock pendant in rose goldBoulder opal, orange & green garnet earrings in 18ct yellow goldWatermelon tourmaline & sapphire pendant in rose & white goldRound emerald pendantWatermelon tourmaline cabochon cufflinks in silverAmethyst & 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.

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From our customers…

Mrs R writes…

My ring has just this minute been delivered. I am delighted with the purple sapphire you chose. I couldn’t have picked better myself!
Thank you for all your help and interest in replacing my missing gem. I will definitely recommend you to others and I hope to purchase from you in the future.

Mrs B writes…

I love my necklace - it’s FABULOUS and was much admired when worn on Saturday night for the first time.


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