Cartesian Ring (Walnut/Carbon)
Striking carbon meets genuine walnut — innovation and nature united in every Cartesian Ring.
Made from genuine natural materials, with unique variations in color and texture.
Free shipping including trackingOur customers benefit from fast and free shipping. More information >
24-month warrantyDuring the first 24 months, we take care of any issues that arise through normal use. Learn more >
Free 24-day return | Club accountClub membership is 100% free – members receive a prepaid return label at no extra cost. Even without an account, you can return within 24 days, with a small label fee. Here.
Packaged as a gift?
Description
The visual representation in the coordinate system is a good aid for complex mathematical problems and turns confusing puzzles into solvable challenges.
Stay on top of any challenge with your "Cartesian" ring! The combination of warm walnut wood, carbon fibre and stainless steel is guaranteed to be waterproof and is the perfect complement to any outfit. With your "Cartesian" you'll surely be ready for any challenge you may face in life!
Details
| Ring width | 8 mm |
|---|---|
| Ring size | Available in various sizes |
| Material | 316L stainless steel in carbon, carbon fibres and finely grained walnut wood |
What's included
Your model
Storage box
Cork holder
Protective packaging
Core features
Where nature meets craftsmanship
Every HOLZKERN piece begins with genuine natural materials from the forests, mountains, and oceans of our planet. With precision, experience, and innovative technology, we preserve nature's unique character and make it wearable every day. The result: accessories that are as individual as you are and remind you of your uniqueness for years to come.
Nature through and through—that's what our watches and jewelry stand for. The unique grains and textures of wood and stone make every HOLZKERN product truly one of a kind.
When you shop with HOLZKERN, you support a young family business founded in Upper Austria in 2016.
Our watches, bandlets, and jewelry come beautifully packaged in wooden boxes. We also use recycled paper to protect your order during shipping, and our self-sealing boxes mean we don't need plastic tape.
As soon as you place your order, your one-of-a-kind piece is on its way to you. Too fast? No worries—you have 24 days after delivery to change your mind if you're not completely satisfied.
“With Holzkern I always want to express my love for nature and have set myself the goal of creating the perfect piece of nature for everyone.”
