At Mari Thomas we have distinctive, beautifully designed award-winning jewellery for the woman who wants something unique and different.


Mari has designed and produced award winning collections to suit a vast array of tastes and aesthetics. Whether you are a less is more or a more is more woman.

Unique Jewellery designed for Women

765 products

Glissando: 9ct Rose Gold Circular Pendant with Diamonds - Mari Thomas Jewellery
Mari Thomas Jewellery Glissando nell' oro: 9ct Rose Gold Circular Pendant with Diamonds
£3,170.00
£3,170.00
Grey 8mm round Freshwater pearl stud earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Grey 8-8.5mm round freshwater pearl stud earrings
£96.00
£96.00
SOLD OUT
White 9mm Freshwater Teardrop Pearl Crook Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery White 9mm freshwater teardrop pearl drop earrings
£95.00
£95.00
Grey 9mm Freshwater Teardrop Pearl Crook Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Grey 9mm freshwater teardrop pearl drop earrings
£95.00
£95.00
Contemporary Welsh gold jewellery designed and made in Wales and inspired by the Welsh landscape handcrafted stud earrings in solid 18ct yellow gold
Mari Thomas Jewellery *New* Carved Fine: 18ct gold square earrings
£1,130.00
£1,130.00
Contemporary Welsh gold jewellery designed and made in Wales and inspired by the Welsh landscape. The stud earrings are handcrafted in solid 18ct yellow gold
Mari Thomas Jewellery *New* Carved Fine: 18ct gold rectangle earrings
£1,340.00
£1,340.00
Peach Pink Cultured River Pearl Necklace - Mari Thomas Jewellery
Mari Thomas Jewellery One-of-a-kind: Peach pink cultured river pearl necklace with 14ct gold clasp
£185.00
£185.00
Pale Pink Cultured River Pearl Necklace With Silver Sparkle Clasp - Mari Thomas Jewellery
Mari Thomas Jewellery Pink cultured river pearl necklace with silver sparkle clasp
£220.00
£220.00
Mixed Cultured River Pearl Necklace With 9ct Gold Ball Clasp - Mari Thomas Jewellery
Mari Thomas Jewellery One-of-a-kind: Mixed cultured river pearl necklace with 9ct gold ball clasp
£345.00
£345.00
White Cultured River Pearl Necklace With 9ct Clasp - Mari Thomas Jewellery
Mari Thomas Jewellery One-of-a-kind: White cultured river pearl necklace with 9ct clasp
£165.00
£165.00
Mari Thomas Jewellery Bubbles silver bracelet
£135.00
£135.00
Mari Thomas Jewellery Mari Thomas E-Card Gift Voucher
from £5.00
from £5.00
Gift Wrap - Mari Thomas Jewellery
Mari Thomas Jewellery Gift Wrap
£0.00
£0.00
Large Silk Scarf - Limited Collection - Mari Thomas Jewellery
Mari Thomas Jewellery Limited Edition: Large Silk Scarf
£195.00
£195.00
Limited Edition: Small Silk Scarf - Mari Thomas Jewellery
Mari Thomas Jewellery Limited Edition: Small Silk Scarf
£80.00
£80.00
SOLD OUT
One of a Kind: (No 1.) Bespoke Silver and Diamond Bubbles Necklace - Mari Thomas Jewellery
Mari Thomas Jewellery One of a Kind: (No 1.) Bespoke Silver and Diamond Bubbles Necklace
£995.00
£995.00
Contemporary Welsh gold jewellery designed and made in Wales and inspired by the Welsh landscape. This ring suitable for men or women is handcrafted in solid 18ct yellow gold
Mari Thomas Jewellery *New* Carved Fine: 18ct gold ring
from £1,490.00
from £1,490.00
Contemporary Welsh gold jewellery designed and made in Wales and inspired by the Welsh landscape. The necklace is handcrafted in 18ct yellow gold
Mari Thomas Jewellery *New* Carved fine: 18ct gold pendant
£2,400.00
£2,400.00
Grey 7mm Round Freshwater Pearl Stud Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Grey 7-7.5mm round freshwater pearl stud earrings
£77.00
£77.00
Decorative Concepts: Black Silver Large Torque Bangle - Mari Thomas Jewellery
Mari Thomas Jewellery Decorative Concepts: Black Silver Large Torque Bangle
£700.00
£700.00
Grey 7mm Freshwater Teardrop Pearl Crook Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Grey 7.5mm freshwater teardrop pearl drop earrings
£70.00
£70.00
White 7mm Freshwater Teardrop Pearl Crook Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery White 7.5mm freshwater teardrop pearl drop earrings
£70.00
£70.00
Pink 7mm Freshwater Teardrop Pearl Crook Earrings - Mari Thomas Jewellery
Mari Thomas Jewellery Pink 7.5mm freshwater teardrop pearl drop earrings
£70.00
£70.00
Contemporary Welsh gold jewellery designed and made in Wales and inspired by the Welsh landscape. The identity style bracelet is handcarved in 18ct yellow gold
Mari Thomas Jewellery *New* Carved Fine: 18ct Gold Bracelet
£2,400.00
£2,400.00
White 6mm round Freshwater pearl stud earrings - Mari Thomas Jewellery
Mari Thomas Jewellery White 6-6.5mm round freshwater pearl stud earrings
£47.00
£47.00
Pink 7.5mm Freshwater Teardrop Pearl Pendant - Mari Thomas Jewellery
Mari Thomas Jewellery Pink 7.5mm freshwater teardrop pearl pendant
£93.00
£93.00
Round 8mm White Pearl Pendant - Mari Thomas Jewellery
Mari Thomas Jewellery White 8-8.5mm round pearl pendant
£140.00
£140.00
Pink 9mm Freshwater Teardrop Pearl Pendant - Mari Thomas Jewellery
Mari Thomas Jewellery Pink 9mm freshwater teardrop pearl pendant
£108.00
£108.00
SOLD OUT
One of a Kind: (No 2.) Bespoke Carved Ring in Silver and Diamonds - Mari Thomas Jewellery
Mari Thomas Jewellery One of a Kind: (No 2.) Bespoke Carved Ring in Silver and Diamonds
£550.00
£550.00
MT Ring Sizer - Mari Thomas Jewellery
Mari Thomas Jewellery MT Ring Sizer
£7.00
£7.00
SOLD OUT
Mari Thomas Jewellery One-of-a-Kind: (No.3) Bespoke Cofio Pendant in Silver with Emerald Cut Diamond
£685.00
£685.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No 4.) Solitaire Necklace with Round Brilliant Cut Diamond
£895.00
£895.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No 6.) Bespoke Memo Pendant with Rose Cut Diamond.
£685.00
£685.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 5) Bespoke Dathlu Silver Pendant with Old Cut Diamonds
£850.00
£850.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 14) Bespoke Silver Glissando pendant with Triangular Diamond
£650.00
£650.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 10) Bespoke Gyda'n Gilydd Silver Pendant with Marquise Diamond
£985.00
£985.00
Mari Thomas Jewellery One of a Kind: (No. 13) Bespoke Carthenni Silver Pendant with Natural Yellow Diamonds
£2,700.00
£2,700.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 12) Bespoke Carved Silver earrings with diamonds
£995.00
£995.00
Mari Thomas Jewellery One of a Kind: ( No.16 ) Bespoke Dadeni Silver and Diamond Neckpiece
£2,900.00
£2,900.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 11) Cube Pendant with Assher Cut Diamond
£1,550.00
£1,550.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 8) Bespoke Decorative Concepts Silver Pendant with Oval Diamond
£995.00
£995.00
Mari Thomas Jewellery Glissando: Small silver stud earrings
£95.00
£95.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 7) Brushstrokes Pendant with black diamonds
£950.00
£950.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 9) Solitaire Series 2 Necklace with Princess Cut Diamond
£1,295.00
£1,295.00
Mari Thomas Jewellery Pages Collection: Silver Statement Neckpiece
£1,950.00
£1,950.00
SOLD OUT
Mari Thomas Jewellery Pages Collection: Triple Silver Pendant
£450.00
£450.00
Mari Thomas Jewellery Pages Collection: Large Silver Pendant
£200.00
£200.00
Mari Thomas Jewellery Pages Collection: Small Silver Pendant
£170.00
£170.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No 15.) Bespoke Silver and Diamond Slice Pendant
£1,550.00
£1,550.00
carthenni silver and gold plated large pendant - welsh blankets Mari Thomas
Mari Thomas Jewellery Carthenni Embossed: Caernarfon 1 Design- Large silver and gold pendant
£440.00
£440.00

+44 (0) 1558 660001
Secure checkout
Sustainably and ethically made
5 Star excellent on Trustpilot