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

Thursday 28th October

Here at Just Gems we travel the world to bring our clients the finest selection of loose gemstones and gemset jewellery.

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Upcoming Events

Thursday 4th November ~ 10:00am

If you are planning making a trip to the Winchcombe shop to see Helen, please call 07732 835704 to make an appointment. Helen has a large number of speaking engagements, plus she frequently travels to purchase stock and meet clients. If you wish to discuss a commission, remodelling work or gemstone identification, you need to speak to Helen and in order for you to receive the expert help you need, it is recommended that you have an appointment ahead of your journey to the shop.

See further details

Featured Jewellery

Fancy grey diamond three stone ring in platinumAustralian crystal shell opal set in 18ct yellow gold ringTourmaline & garnet ringSapphire & diamond cluster ring in 18ct yellow goldOval black opal & tsavorite garnet ringWood opal pendant in palladium & 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…

Mrs H writes…

My husband and I recently purchased rings from you for our golden wedding anniversary. The ring designed for me is absolutely gorgeous and such a pleasure to wear, all friends and family think the ring is amazing, it has made a special anniversary even more special, my husband is also thrilled with his wedding ring he says its just made him feel special again! I cannot say thankyou enough. You have made two people very happy with two such special pieces of jewellery. I have recommended you to our friends and family and will continue to recommend you to anyone who asks about my lovely ring. Thankyou so very much, from two very happy customers.

Mrs C writes…

My wedding day has now past and it was the best day I have ever had. Thank you for all that you have done to make it great.


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