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

The shop will be closed Monday 8th January to Monday 22nd January.
We will re-open on Tuesday 23rd January.

Our Latest News

Thursday 18th January

During my trip to Myanmar, I found some of the world’s oldest Amber but that wasn’t the only beautiful gemstone that I returned with.

There is a wonderful selection of Jade in Burma, in all sorts of vibrant colours. The Chinese buyers who were at the…

Read More

Upcoming Events

Wednesday 10th January ~ 2:16pm

Helen is currently in Bogota looking for emeralds. Emeralds have tripled in price in the last 10 years and were the gemstone of choice at the Golden Globes, a perfect accessory for the dramatic or little ‘black dress’. Watch out for photos and the date of a new talk on this majestic gemstone.

See further details

Featured Jewellery

Ruby & pearl pendant in goldBlack diamond briolette drop pendantPink topaz & chrysoberyl necklaceKunzite & opal pendantShamrock pendant in rose goldDiamond slider pendant in 18ct white goldTourmaline & diamond pendantInlaid Black Opal EarringsRubellite & golden diamond ring in goldAmethyst & sapphire pendant in rose & white goldTanzanite & sapphire pendant in 18ct white goldRutilated quartz & sapphire pendant in 18ct white goldBlack opal and pink sapphire heart ring in platinumGolden pear cut diamond ringParaiba tourmaline & diamond ring in platinumKildrummy 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 N writes…

Just wanted to say a big thank you for the ring it looks amazing! Can’t wait to show it off, thank you for all your work.

Mrs C writes…

The earrings arrived safely…so well packed !
They are just what I was looking for… neat, pretty blue studs.
Thank you for your excellent service.


Read More Testimonials