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 is now relocating to Winchcombe, in the Cotswolds.

Black Opal & Pink Sapphire Heart Ring in Platinum

7.73ct oval black solid opal from New South Wales, Australia, set with a 0.93ct pair of bright reddish/pink heart cut sapphires in platinum

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 is now relocating 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

Tuesday 21st November

Our beautiful new shop will open next month, the count down begins!

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Featured Jewellery

Pink topaz & chrysoberyl necklace
Kunzite & opal pendant
Ruby & pearl pendant in gold
Shamrock pendant in rose gold
Black diamond briolette drop pendant
Diamond slider pendant in 18ct white gold
Tourmaline & diamond pendant
Inlaid Black Opal Earrings
Rubellite & golden diamond ring in gold
Amethyst & sapphire pendant in rose & 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 K writes…

Dear Helen
I have just returned home after a splendid weekend in Edinburgh celebrating my birthday with my son and his fiancée. On Saturday evening we dined at Prestonfield House. The candlelight was just the perfect medium to show off your superlative pendant which I absolutely love. It was presented to me whilst sharing a champagne toast before we went into dinner, so I had to wait until I could skip out to the powder room to admire it. Thank you so much. It really is quite stunning.

Mrs G writes…

I’m so delighted with Helen’s designs. After my husband died, I had
wanted the sapphire & diamonds from both my engagement and eternity rings
to be re-styled into pendants. Helen’s advice was spot-on. Now I have two
beautiful pieces which I can wear close to my heart always. Thanks so much.


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