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.

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 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 March

In today’s blog, Helen gives a background on aquamarine – March’s birthstone; a beautiful stone that ranges in colour from green to a blue.

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Upcoming Events

Thursday 23rd May ~ 2:00pm

Helen Plumb will be giving a talk on Coloured Gemstones to the Chatterbox Lunch Club at 2pm on Thursday 23rd May 2019. The event will be held at The Pavilion, Hatherley Lane, Cheltenham. Please contact Sue Gyles (suegyles@msn.com) or 01242 243351 for more information.

See further details

Featured Jewellery

Rubellite & 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 silverYellow diamond 5 stone cluster ring in 18ct yellow goldKunzite & opal pendantAmethyst & 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 B writes…

I lost my engagement ring. I had often walked past ‘Just Gems’ in Cults, Aberdeen but following the loss, I decided to have a look in the shop window to see if there was any ring on show similar to mine. Although the shop was officially closed, Helen welcomed me into the shop to discuss what I required.
It was immediately apparent that Helen was an expert and knew precisely what I was looking for. She showed me stones which would have been good replacements but she thought she could do better if I could wait. Following a trip to Burma, Helen phoned to say that she had sourced stones which she thought would suit me. I was not disappointed. We discussed the design of the new ring and she was able to show me a computer simulation of what the final ring might look like.
I was thrilled with the ring when it arrived after a few weeks. It is almost identical to the ring I lost. I could have gone to high street jewellers and bought a ring similar to the one I lost but I was pleased that I went to Helen Plumb at Just Gems. There I got excellent service from someone who obviously knew her business. The workmanship on the ring is first class and my ring has been admired by many.
It is a pity that Just Gems is moving south but what is Aberdeen’s loss will be the Cotswolds gain. We wish her all the best for a successful business in Winchcombe.

Mrs F writes…

Thanks again for a great evening. The gemology talk was really interesting… if not nearly a little dangerous. My god I loved that opal ring!


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