In 2023 I celebrated 25 years in business, my silver anniversary, and to mark it I made 25 pieces in silver, each set with an exquisite diamond, or diamonds, and inspired by a collection past or present. It felt like the perfect moment to bring together contemporary design, the finest materials, and everything I'd learned along the way.

They began as individual treasures through the anniversary year, and I've carried on making them since, each one handcrafted in my Welsh workshop. Do have a look at what's here.

25 for 25

18 products

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 One of a Kind: ( No.16 ) Bespoke Dadeni Silver and Diamond Neckpiece
£2,900.00
£2,900.00
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. 14) Bespoke Silver Glissando pendant with Triangular Diamond
£650.00
£650.00
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
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 15.) Bespoke Silver and Diamond Slice Pendant
£1,550.00
£1,550.00
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. 9) Solitaire Series 2 Necklace with Princess Cut Diamond
£1,295.00
£1,295.00
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 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 4.) Solitaire Necklace with Round Brilliant Cut Diamond
£895.00
£895.00
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: (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
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
+44 (0) 1558 660001
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