TIME FRANCE feature
“A jewellery that celebrates freedom, movement and personal expression. ONTOO imagines precious jewels designed to accompany every moment of life, with elegance and naturalness.”
ONTOO is Swiss Jewellery of the highest quality, designed by and made for the cosmopolitan, confident, and independent woman — a woman who knows craftsmanship, values authenticity, and leads a dynamic life.
Each piece is a reflection of her individuality, with customisable elements that adapt to her style and ambition, and the enduring brilliance of gold, gemstones, and diamonds that mirror her strength and elegance.
Shop the Leather Collection 40% Off
OUR COLLECTIONS
Iconic Collection
Infinity Collection
Flower Collection
Clover Collection
Leather Collection
About ONTOO
Born from Martina Baeriswyl-Holzach’s lifelong passion for fine jewellery and fashion, ONTOO blends timeless design with modern versatility. Raised in Argentina with Swiss roots, Martina was inspired by her mother’s collection of antique jewellery and gemstones — a love that grew into a vision for everyday luxury.
Every ONTOO piece reflects her belief that true elegance is effortless, versatile, and lived. From refined jewellery to sophisticated fashion, the brand celebrates individuality and a lifestyle of comfort and timeless beauty.
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!
ONTOO’S Showroom
Discover the world of ONTOO in person. Our Zurich showroom is where design meets craftsmanship — a welcoming space where you can explore the full range of collections, feel the quality of our materials, and try on pieces that speak to your personal style.
Whether you're looking for something timeless, customisable, or truly one-of-a-kind, we’re here to guide you through every detail. Private appointments are available to offer you a personalised experience and answer any questions you may have about customisation, stones, or styling.
Mission
ONTOO celebrates personal expression through customisable fine jewellery — designed to evolve with you. Built around five core collections, each piece can be personalised by ‘adding on’ elements — more stones, different finishes, or interchangeable details — making every creation as unique as the person who wears it.
Designed in Switzerland, crafted in Turkey.
Every ONTOO piece is born in Zurich, where founder Martina Baeriswyl-Holzach designs each creation in her atelier. With a firm commitment to quality, Martina works exclusively with solid gold, natural gemstones, and ethically sourced diamonds — crafting fine jewellery that blends timeless luxury with contemporary flair.
For over a decade, Martina has collaborated with a trusted family-run atelier in Istanbul, Turkey. Masters of their craft for generations, this close-knit team brings ONTOO designs to life with expert craftsmanship and responsibly sourced materials.
What sets ONTOO apart is its thoughtful attention to detail: closures designed for the modern, cosmopolitan woman; modular elements for customisation; and a seamless balance between elegance and practicality. The result? Fine jewellery that’s as adaptable and sophisticated as the women who wear it.
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!
Contact us.
-
![A woman with red hair wearing jewelry, sitting outdoors on rocks, dressed in a black sleeveless top.]()
Sell it.
-
![Ontoo luxury gold necklace with real gemstones, designed in Zurich. Perfect for layering.]()
New List Item
-
![Multiple gold and silver layered necklaces with flower and geometric shaped charms worn over a white satin blouse.]()
New List Item
-
![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.]()
New List Item
-
![Swiss handcrafted diamond flower ring for elegant women. Elegant flower-shaped diamond ring, handmade in Switzerland.
Unique diamond floral ring, luxury Swiss design.]()
New List Item
ABOUT ONTOO
ONTOO Jewellery, a passion-born brand with a very distinct vision: to craft customizable jewellery. Tailored to the cosmopolitan woman and man, this unique brand delivers what they seek - that special piece that can be combined or coupled ontoo any outfit, ultimately completing it.
Discover the Iconic Collection
Little Gold Iconic Necklace with Diamond Pavé. A refined piece from the ONTOO Iconic Collection, this delicate gold necklace features a small, iconic cross-inspired pendant adorned with shimmering diamond pavé. Understated yet radiant, it's the perfect everyday luxury — elegant worn alone or layered with other favorites.
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!
Versatile 14K rose gold earrings celebrate modern luxury with a refined twist on the classic Greek cross. The set features a brilliant diamond stud paired with two detachable Iconic elements—wear the stud alone for minimalist elegance, or layer the Iconics for a bold statement. Available in smooth rose gold or accented with pavé diamonds, this sophisticated design effortlessly balances symbolic beauty, contemporary style, and timeless craftsmanship.
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!
Available in two exquisite sizes, the Iconic Pendant in 18K rose gold defines modern luxury. The medium pendant (19.87 mm) offers a refined pavé setting of champagne or TTLB diamonds, while the larger Iconic Big Pendant (25.30 mm) dazzles with approximately 90 TTLB diamonds totaling 2.33 ct. Both sizes embody timeless sophistication and can be personalized—click ‘Customize’ to request a chain and complete your perfect necklace.
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!
Join the ONTOO movement
