I've spent more than thirty years in the world of jewellery, from my college and university days onward, and more than twenty-eight of them running my own business. In that time I've created over twenty-five collections, along with several limited editions and countless one-off and commissioned pieces.

I don't design to trends. I'd rather make jewellery with stories and meaning, pieces with a timeless beauty, made to be worn now and to become heirlooms, treasured for generations to come.

You can see all my current collections here, and if you're ever able, I'd love you to visit us in our gorgeous gallery in Llandeilo, south-west Wales, where you can see the collections in their full beauty and try pieces on to see how they feel.

Mari Thomas Collections

306 products

Contemporary Welsh silver jewellery. Inspired by Welsh slate and coal and the beautiful landscape of Wales. These black oxidised square stud earrings are designed and handmade in Wales
Mari Thomas Jewellery Carved: Square Black Silver Earrings
£145.00
£145.00
Mari Thomas Jewellery Carved: Black Silver Rectangle Earrings
£185.00
£185.00
Mari Thomas Jewellery Cofio / Remember: Black silver lapel / tie pin
£110.00
£110.00
Cofio long earrings, silver and 18ct gold plated silver — Waldo Williams's words cast in metal — Clustdlysau Arian ac Aur
Mari Thomas Jewellery Cofio / Remember: Long Gold and Silver Earrings
£340.00
£340.00
Cofio cufflinks, silver and 18ct gold plated silver — Waldo Williams's words cast in metal — Botymau Coesau Arian ac Aur
Mari Thomas Jewellery Cofio / Remember: Gold and Silver Cufflinks
£340.00
£340.00
Mari Thomas Jewellery Carved: Black Silver Fractured Pendant
£225.00
£225.00
Decorative Concepts large studs, black oxidised silver — covered in Mari's own handwriting at bold scale — Clustdlysau Arian
Mari Thomas Jewellery Decorative Concepts: Large Black Silver Earrings
£92.00
£92.00
Decorative Concepts charm bracelet, black oxidised silver — a mark drawn from Mari's sketchbook — Breichled Arian
Mari Thomas Jewellery Decorative Concepts: Black Silver Charm Bracelet
£137.00
£137.00
Decorative Concepts charm bracelet, 18ct rose gold plated silver — a mark drawn from Mari's sketchbook — Breichled Arian ac Aur
Mari Thomas Jewellery Decorative Concepts: Rose Gold Charm Bracelet
£227.00
£227.00
Decorative Concepts medium pendant, 18ct rose gold plated silver — a bold pen stroke cast in metal — Mwclis Arian ac Aur
Mari Thomas Jewellery Decorative Concepts: Rose gold medium pendant
£430.00
£430.00
Decorative Concepts drop pendant, 18ct rose gold plated silver — covered in handwritten script — Mwclis Arian ac Aur
Mari Thomas Jewellery Decorative Concepts: Rose Gold Drop Pendant
£278.00
£278.00
Decorative Concepts statement earrings, 18ct rose gold plated silver — a bold pen stroke cast in metal — Clustdlysau Arian ac Aur
Mari Thomas Jewellery Decorative Concepts: Rose Gold Statement Earrings
£490.00
£490.00
Memo: Long Silver Paperclip Necklace - Mari Thomas Jewellery
Mari Thomas Jewellery Memo: Long Silver Paperclip Necklace
£495.00
£495.00
SOLD OUT
Linear: Silver Lapel / Tie Pin - Mari Thomas Jewellery
Mari Thomas Jewellery Linear: Silver Lapel / Tie Pin
£80.00
£80.00
Mari Thomas Jewellery Cofio / Remember: Silver lapel/tie pin
£110.00
£110.00
Decorative Concepts ring, a bold sketchbook line cast in sterling silver — Modrwy Arian
Mari Thomas Jewellery Decorative Concepts: Large Silver Statement Ring
£290.00
£290.00
Mari Thomas Jewellery Glissando: Small Silver Circular Pendant
£230.00
£230.00
Decorative Concepts lapel pin, sterling silver — a considered mark drawn from paper
Mari Thomas Jewellery Decorative Concepts: Silver Lapel / Tie Pin
£95.00
£95.00
Mari Thomas Jewellery Carthenni Silhouette: Solid silver cross earrings
£130.00
£130.00
Decorative Concepts large pendant on its chain, a bold sketchbook mark — Mwclis Arian
Mari Thomas Jewellery Decorative Concepts: Large Silver Pendant
£680.00
£680.00
Limited Edition: Small Silk Scarf - Mari Thomas Jewellery
Mari Thomas Jewellery Limited Edition: Small Silk Scarf
£80.00
£80.00
Mari Thomas Jewellery Glissando: Medium silver earrings
£160.00
£160.00
Mari Thomas Jewellery Glissando: Large Silver Pendant
£210.00
£210.00
Dathlu / Celebration: Long Drop Silver Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Dathlu / Celebration: Long Drop Silver Earrings
£300.00
£300.00
Mari Thomas Jewellery Cariad / Love: Silver Lapel / Tie Pin
£125.00
£125.00
Golden Bubbles small stud, 18ct gold — clustered circles inspired by rising champagne bubbles — Clustdlysau Aur
Mari Thomas Jewellery Golden Bubbles: 18ct Gold Small Earrings
£680.00
£680.00
SOLD OUT
Bubbles linked bracelet, sterling silver — clustered circles inspired by rising champagne bubbles — Breichled Arian
Mari Thomas Jewellery Bubbles: Silver Linked Bracelet
£670.00
£670.00
Bubbles bangle, sterling silver — clustered circles inspired by rising champagne bubbles, front view — Breichled Arian
Mari Thomas Jewellery Bubbles: Silver Bangle
£1,480.00
£1,480.00
Brushstroke brooch, sterling silver — a single considered stroke of paint cast in metal
Mari Thomas Jewellery Brushstroke: Silver Brooch / Lapel pin
£125.00
£125.00
Mari Thomas Jewellery White fresh water pearl cloud silver pendant 4
£95.00
£95.00
Mari Thomas Jewellery White fresh water pearl cloud silver pendant 3
£95.00
£95.00
Mari Thomas Jewellery White fresh water pearl cloud silver pendant 2
£95.00
£95.00
Mari Thomas Jewellery White fresh water pearl cloud silver pendant 1
£95.00
£95.00
Mari Thomas Jewellery Silver drop white fresh water pearl pendant
£65.00
£65.00
Mari Thomas Jewellery Brushstroke: Silver Statement necklace
£1,350.00
£1,350.00
Mari Thomas Jewellery *New* Solitaire: Small Silver Necklace with Citrine
£430.00
£430.00
Mari Thomas Jewellery *New* Solitaire: Small Silver Necklace with Peridot
£430.00
£430.00
Bubbles pendant set with chrome diopside, sterling silver — clustered circles inspired by rising champagne bubbles — Mwclis Arian
Mari Thomas Jewellery *New* One of a kind: Medium Bubbles with Chrome Diopside
£550.00
£550.00
Silver necklace with a pendant on a light gray background small black silver fragile form pendant handcrafted and designed in Wales UK by mari thomas jewellery
Mari Thomas Jewellery *New* Fragile Form Small Black Silver Pendant 3
£230.00
£230.00
Mari Thomas Jewellery *New* Fragile Form Small Black Silver Pendant 1
£230.00
£230.00
Mari Thomas Jewellery *New* Fragile Form Small Silver Pendant 4
£230.00
£230.00
Mari Thomas Jewellery *New* Fragile Form Small Silver Pendant 2
£230.00
£230.00
Mari Thomas Jewellery *New* Fragile Form Silver Pendant 1
£450.00
£450.00
Bespoke Bubbles necklace with uncut diamond, sterling silver — clustered circles inspired by rising champagne bubbles — Mwclis Arian
Mari Thomas Jewellery *NEW*One of a kind: No 19 Bespoke silver Bubbles necklace with uncut diamond
£1,850.00
£1,850.00
Mari Thomas Jewellery Pink & white baroque cultured pearl necklace with round ball clasp
£225.00
£225.00
Mari Thomas Jewellery White baroque pearl necklace with round magnetic clasp
£230.00
£230.00
Mari Thomas Jewellery White silver keshi style pearl necklace with silver magnetic clasp
£250.00
£250.00
Mari Thomas Jewellery White silver keshi style necklace with silver magnetic clasp
£230.00
£230.00
Mari Thomas Jewellery White baroque pearl necklace with silver magnetic clasp
£230.00
£230.00
Mari Thomas Jewellery Mixed natural colour baroque pearl necklace with silver magnetic clasp
£195.00
£195.00
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