Handmade jewelry inspired by
travels, simplicity and vibrancy.

Natasha Casteleyn (°1979 – Brussels)

After having travelled the world during my twenties I decided to settle down in Antwerp (Belgium)

I obtained a Master in Political and Social Sciences in Ghent and then headed to Barcelona, where I studied Documentary Film and Photography and lived for 8 years. A 2-year intermezzo in Buenos Aires (Argentina) awakened my creativity but it is truly during my one-year honeymoon through Australia and Southeast Asia , and the meeting of a  traditional Japanese master silversmith  that I discovered my passion for silversmithing.

After a few years of combining my day job in the social sector – helping immigrants find their way in Belgian society- and silversmithing, it is in 2015 after the birth of our second child that I decided to take the plunge to full time self employement.

My gold and silver supplier is a certified company using only recycled metals (as in not newly mined gold/silver) and in my workshop I do not use acids or chemicals but only natural products. Because my little family and me are avid travellers I like to keep my workshop mobile and not use big machinery which limits my technical possibilities to re-purpose old gold customers would want to re-use in a new piece of jewellery.


Nimzu’s trademark is elegance and simplicity. I design jewellery for young women who want to step away from fast-fashion and  search for quality and craftsmanship but at affordable prices.

I loves to play with the “stacked” concept. wearing necklaces, rings and bracelets together to create a subtle yet unique result.

Every single piece of Nimzu jewelry is handmade in out collective workspace Atelier Usine and created with sterling silver 925 or 14 carat gold.


“The minimalistic design keeps it pure and elegant, the silver and gold warm and playful.”


“The geometry and simple lines of my collections keep it pure and elegant, the silver and gold warm and playful. Every collection grows organically. I want people to experiment with my jewellery line, the combinations are endless: a casual daytime ensemble might transform into a dressed-up night outfit by switching one single piece.”

I am fluent in Dutch, French, Spanish and English. Married to Frederik,  mother of Felix and Rosie.