Here, at Mari Thomas, you will find her contemporary, individual and unique jewellery in gold and silver sparklingly embellished and enhanced with carefully sourced and selected conflict free diamonds.

We can design and create bespoke commissions for that special someone, or that special day, or maybe add some sparkle to an existing piece to give it that extra something.

Designed and made in Wales UK

Mari Thomas Diamond Jewellery

20 products

Mari Thomas Jewellery Last Chance: Llawennau / Rejoice Long Silver Pendant with Diamonds
£525.00
£525.00
One of a kind Golden Bubbles pendant with diamonds, 18ct gold — clustered circles inspired by rising champagne bubbles — Mwclis Aur
Mari Thomas Jewellery One of a kind: Golden Bubbles pendant set with 1.50ct diamonds
£12,900.00
£12,900.00
Mari Thomas Jewellery Solitaire: Black Silver bangle with Diamond
£950.00
£950.00
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.18 ) Bespoke Carreg necklace / brooch in silver with baguette cut diamond
£1,990.00
£1,990.00
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
One of a kind Bubbles necklace, sterling silver and diamonds — clustered circles inspired by rising champagne bubbles — Mwclis Arian
Mari Thomas Jewellery One of a Kind: (No 1.) Bespoke Silver and Diamond Bubbles Necklace
£995.00
£995.00
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. 10) Bespoke Gyda'n Gilydd Silver Pendant with Marquise Diamond
£985.00
£985.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No. 12) Bespoke Carved Silver earrings with diamonds
£995.00
£995.00
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 6.) Bespoke Memo Pendant with Rose Cut Diamond.
£685.00
£685.00
SOLD OUT
One of a kind Brushstroke pendant with black diamonds — a darker, more dramatic sweep of paint — Mwclis Arian
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. 14) Bespoke Silver Glissando pendant with Triangular Diamond
£650.00
£650.00
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
SOLD OUT
Mari Thomas Jewellery One of a Kind: (No 4.) Solitaire Necklace with Round Brilliant Cut Diamond
£895.00
£895.00
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. 9) Solitaire Series 2 Necklace with Princess Cut Diamond
£1,295.00
£1,295.00
SOLD OUT
Mari Thomas Jewellery One of a Kind: ( No.17 ) Bespoke Linear torque bangle with baguette cut diamonds
£1,700.00
£1,700.00
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
+44 (0) 1558 660001
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