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

Thursday 8th February

Amethyst is a variety of quartz (silicon dioxide). As the birthstone for February, it is said that it can strengthen relationships and give courage and Ancient Greeks believed it prevented drunkenness. It is a popular gemstone in jewellery because of its beautiful purple colour, which can range from pale pinkish-purple to deep purple tinged with either magenta or blue, and its relative affordability.

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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.

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From our customers…

Ms K writes…

Thank you do much for the parcel. The pendant is truly stunning and was much admired at Gem-A. The earrings are lovely too and my daughter really likes them, the garnets are really lustrous and deep.

Mr G writes…

We received the pendant exactly as you indicated; thanks for the expert service. A great success. Look forward to doing business again.


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