Welcome to ONTOO
ONTOO creates timeless Swiss jewellery for you, a woman who knows who she is, values authenticity, and chooses beauty with meaning.
Designed for your cosmopolitan, confident, and independent spirit, each piece reflects your individuality. With customisable elements, every creation becomes uniquely yours, adapting to your style, your ambitions, and the way you live.
Crafted in gold and adorned with exceptional gemstones and diamonds, your ONTOO jewellery is more than something you wear. It is a reflection of your strength, your elegance, and the story you continue to write.
OUR COLLECTIONS
Iconic Collection
Infinity Collection
Flower Collection
Clover Collection
Leather Collection
ONTOO’S Showroom
A private space to discover ONTOO at your own pace. Explore our collections, experience exceptional craftsmanship, and receive personalised guidance in selecting or creating a piece you'll treasure for years to come.
ON+TOO
The name says it all.
"ON" represents the jewellery you already own. "TOO" is the next piece you choose to add.
ONTOO was created with the belief that a jewellery collection should evolve with you—growing over time through meaningful pieces chosen to celebrate life's moments.
Because the finest collections are never finished. They are simply added to.
Diamonds Addiction
The Medium Zip-Flower Diamond Necklace in white gold redefines modern elegance with its sleek, delicate zip-flower motif adorned in shimmering pavé diamonds. Designed with an adjustable length, this versatile piece effortlessly adds a touch of refined luxury and subtle sparkle to any ensemble.
This piece is fully customizable — choose your preferred gold finish, gemstone, or add detachable elements to make it uniquely yours.
Click here to CUSTOMIZE!
Connect with our team and make your jewellery dreams come true!
Medium Gold Flower Diamond Pavé Earrings. Featuring a versatile design with both clip-on and foldable stud options, these medium-sized gold flower earrings are adorned with sparkling diamond pavé detailing—perfect for comfort and elegance in one.
This piece is fully customizable — choose your preferred gold finish, gemstone, or add detachable elements to make it uniquely yours.
Click here to CUSTOMIZE!
Connect with our team and make your jewellery dreams come true!
Gold Mini Flower Diamond Pavé Necklace. A stunning and delicate piece that adds a touch of everyday luxury and elegance to any occasion. Perfectly designed to complement both casual and special moments.
This piece is fully customizable — choose your preferred gold finish, gemstone, or add detachable elements to make it uniquely yours.
Click here to CUSTOMIZE!
Connect with our team and make your jewellery dreams come true!
The Founder
Meet Martina Baeriswyl, the founder and creative force behind ONTOO.
For Martina Baeriswyl, jewellery has always been more than an accessory. Inspired by her Swiss heritage, her mother's treasured collection, and years working with luxury brands, she founded ONTOO to create timeless pieces designed to become part of everyday life.
A stunning 14k rose gold pendant featuring a 0.80 ct pink tourmaline accented by 1 ct of pavé diamonds at the center. Comes with a handmade 14k rose gold link chain, 47 cm in length — elegant and timeless.
This piece is fully customizable — choose your preferred gold finish, gemstone, or add detachable elements to make it uniquely yours.
Click here to CUSTOMIZE!
Connect with our team and make your jewellery dreams come true!
Crafted in 14k rose gold, the Infinity Ring features 12 oval-cut gemstones (1.60 ct total) set seamlessly around the band — available in Pink Tourmaline, Blue Topaz, or Citrine.
Designed for versatility and comfort, these rings are perfect for everyday wear. Stack them, pair them, or wear solo for a subtle yet refined statement. Elegant, timeless, and beautifully crafted to last.
Available in size 53/54. Custom sizing and gemstones available upon request. Customizable with white or yellow Gold, different Gemstones, Sapphires and Diamonds
This piece is fully customizable — choose your preferred gold finish, gemstone, or add detachable elements to make it uniquely yours.
Click here to CUSTOMIZE!
Connect with our team and make your jewellery dreams come true!
Mission
Your jewellery should be as unique as you are.
At ONTOO, every piece is designed to evolve with you. Our five signature collections offer endless possibilities to personalise your jewellery, allowing you to add gemstones, choose different finishes, or incorporate interchangeable elements that reflect your style and your story.
Whether you mark a special milestone or simply embrace a new chapter, your ONTOO jewellery grows with you, becoming a timeless expression of who you are.
Designed in Switzerland, crafted in Turkey.
Every ONTOO piece begins with a vision in Zurich, where founder Martina Baeriswyl-Holzach designs each creation with care and intention.
Crafted exclusively from solid gold, natural gemstones, and ethically sourced diamonds, your jewellery is made to be treasured for a lifetime. For more than a decade, Martina has partnered with a family-run atelier in Istanbul, where master artisans bring every design to life with exceptional craftsmanship and generations of expertise.
What makes ONTOO truly special is the thoughtful detail behind every piece. Elegant closures designed for modern living, customisable elements that evolve with your style, and timeless designs that move effortlessly from day to night.
This is jewellery created to become part of your story. Beautiful today, meaningful tomorrow, and treasured for years to come.
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![A woman with red hair wearing jewelry, sitting outdoors on rocks, dressed in a black sleeveless top.]()
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![Ontoo luxury gold necklace with real gemstones, designed in Zurich. Perfect for layering.]()
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![Multiple gold and silver layered necklaces with flower and geometric shaped charms worn over a white satin blouse.]()
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![Ontoo luxury diamond earrings designed as elegant floral motifs, handcrafted in Zurich. Perfect for special occasions or adding a touch of timeless sophistication to any outfit. Made with real diamonds and high-quality gold.]()
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![Swiss handcrafted diamond flower ring for elegant women. Elegant flower-shaped diamond ring, handmade in Switzerland.
Unique diamond floral ring, luxury Swiss design.]()
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