(Recycling not mining precious metals)

At Mari Thomas we strive to do better and want to create better business practices to support positive action towards caring for both people and planet.

We believe that little differences within small businesses, such as ourselves, will make for big environmental change across the World. More so, given the rapid globalisation of the jewellery market and the use of stones and metalsmine from every corner of the Earth.

Therefore, at Mari Thomas we are committed to being as responsible from the way we hand make our jewellery in our in-house workshop, to the precious metals and stones
we source.

 As a small team, we consciously try and manage or develop ways in which we can tread lightly on our planet and reduce our environmental footprint. Before “sustainable” became the hot topic in the fashion and jewellery world, Mari had always crafted jewellery pieces with recycled precious metals, from gold, silver to platinum. We also gather the fine dust when cleaning the workshop to extract the metal to reuse in our jewellery collections.

Nothing is or was ever wasted!


We are a small and dedicated team of artisan jewellers. Mari, Nia, Sara, Sue and Katy are all trained and qualified jewellers and share a joy in creating magical pieces.

The workshop that is nestled inside the Mari Thomas Gallery;
peek through and you can see the girls at work handmaking Mari’s collections, producing new bespoke commissions to restoring or repairing jewellery pieces.

Who we work with - UK based - packaging

carbon footprint


We are based in the beautiful old market town of Llandeilo West Wales.

It has currently be chosen by the Sunday Times as the top place to live in Wales and represents the best of the UK.

Llandeilo is a town of not only famous for its beautiful individual boutique shops but is a town famaous for festivals the highlights being the Literature Festival and the Christmas Fesival of Senses.

Mari Thomas Gallery has been based in Llandeilo for just over 10 years and she purchased the gorgeous grade 2 listed georgian building that was the Castle Hotel which is now the home of her gallery and workshop.

We only use conflict-free and ethically sourced stones.

We have always worked very closely with our stone dealers to ensure that the stones have all been sourced following fair labour practices and sustainable agreements. This measures the effect on people, communities, and our social footprint. Helping to ensure fair play, safe working conditions, environmentally sound practices, and that no human rights have been abused.


We have just launched our alternative packaging – the all new vegan suede eco pouches

Indeed, all of our Mari Thomas packaging, boxes and bags can be reclycled. They are not made from recycled materials so trees are used and replanted in production but to complete the circle they can be recylced.

Only the buttons of the boxes are not made from recycled material, but that is something we are working hard to change.

Our dispatch boxes are made from recycled material and are fully recyclable.

We encourage to reuse and recycle wherever possible.

Collectively, the small changes we make together can make a big difference.


With every order you make, you help us planet a

We decided to partner with Ecologi as a way for us to play a role in helping to revive and restore our planet, through projects supporting tree planting to community restoration.  

Ecologi are aligned with our values and are a fantastic gold standard, B - Corp organisation who are authentic and transparent – with their range of projects supported through their organisation being easily accessible.  

Like so many individuals and businesses, we are climate conscious and sustainability really matters to us, we are committed to the long game and are constantly working towards improving practices within the business.  [superfluous]