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

Tuesday 2nd February

We continue to be busy supporting our clients by all methods to create lovely bespoke jewellery for their loved ones. If you wish to discuss any aspects of jewellery, commissions, repairs, remodelling, purchasing of readymade goods, please give Helen a call on 07732 835704

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Featured Jewellery

Australian crystal shell opal set in 18ct yellow gold ringTourmaline & garnet ringLilac sapphire ring in 18ct white goldWood opal pendant in palladium & 18ct yellow goldRubellite & golden diamond ring in goldShamrock pendant in rose goldBoulder opal, orange & green garnet earrings in 18ct yellow goldWatermelon tourmaline cabochon cufflinks in silverAmethyst & sapphire pendant in rose & white goldTanzanite & sapphire pendant in 18ct white goldBlack opal and pink sapphire heart ring in platinumPink 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…

Mr R writes…

She said ‘yes’ - and thinks the ring is beautiful. Thank you for all the help!

Ms C writes…

I’m so happy I went to Just Gems and met Helen, I own a ring made just for me, I know so much about it, where the stone came from where it was cut where it was hallmarked. The effort Helen went to to find me the right stone was impressive and never at any moment did I feel pressured to buy, I enjoyed the journey from start to finish, from meeting and talking to Helen who is so knowledgeable about Gems, to choosing the stone and then to the day I picked it up. And now everyday feels special when I wear it, and I am someone who never thought she would be owning a bespoke ring and thanks to Helen I am now a very proud owner of a stunning Aquamarine and diamond ring. I would definitely recommend vising Just Gems before buying a readymade ring.


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