To celebrate 25 years in business in 2023, her silver anniversary, Mari created 25 pieces of jewellery in silver, each set with an exquisite diamond or diamonds, and inspired by a current or past collection. The anniversary offered the perfect opportunity to bring together contemporary design and the best materials available, using her award-winning skills.

These pieces were released throughout the year as individual treasures — a small number remain available below.

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
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