Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed on model
Round brilliant cut tennis necklace by IRALIS featuring lab-grown DEF color diamonds in four-prong setting, Zurich designed

Tokyo Tennis Necklace

The Tokyo Diamond Tennis Necklace is a stunning masterpiece that radiates timeless sophistication. With its perfect four-prong setting and luminous lab-grown diamonds, it’s the definition of refined luxury.
CHF 14,500.00
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inkl. MwSt
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Sustainably Created Diamonds and Gemstones
2 Year Warranty & Diamond Certificate

A true icon of elegance, the Tokyo Diamond Tennis Necklace is a masterpiece of precision and radiance. Featuring 10 carats of round brilliant cut lab-grown diamonds with DEF color and VS1-VS2 clarity, each stone is set in a classic four-prong setting to enhance its fire and brilliance. The refined 45 cm length rests gracefully along the collarbone, making it ideal for both elevated evenings and sophisticated daytime style.

Customizable carat weights are available upon request. Meticulously crafted in your choice of 18k yellow, rose or white gold or platinum. All our lab-grown diamond necklaces are made to order, ensuring a unique piece crafted just for you.

Total Carat Weight: 10 carats of lab-grown diamonds on picture

Setting: Classic four-prong setting that enhances the sparkle of each diamond

Diamond Shape: Round brilliant cut

Color Grade: DEF (colorless)

Clarity Grade: VS1-VS2

Length: 45 cm 

Customization: Available in different carat weights, please enquire

One of a Kind: All our pieces are made to order

Lead Time: 3-6 weeks. For rush orders please email

Please refer to further specifications in the product description

Lab-grown diamonds are 100% real diamonds.
They’re chemically, physically and visually identical but without the ethical concerns of mined diamonds.

All our diamonds come in the best color grading D/E/F (white), with a clarity of VVS, VS (no visible inclusions for the naked eye) and they are IGI/GIA/HRD certified from 1 carat/stone.

Our fine jewelry is made to last. We exclusively use high-quality precious metals for all of our rings, necklaces, bracelets, and earrings. That means solid, 18-karat & 14-karat recycled gold as well as Platinum for eternity and engagement rings.

Every piece is made-to-order, created exclusively for you by hand in Italy. From the moment you place your order to the arrival of your exquisite jewelry in its signature blue box, we keep you informed every step of the way, ensuring a seamless and personalized experience.

Please allow for 3-6 weeks lead time.

We send all shipments by registered, insured post, i.e. you must confirm receipt of your order with your signature.

Please verify that you have provided a valid delivery address and ensure that you are available to receive the special parcel on the day when your order arrives.

If you are not at home to receive the shipment yourself (e.g. because it is a gift), the recipient specified on the delivery address must sign for the package.

Exceptional Hand Selected Lab-Grown Diamonds

Diamond Certificates & 2 Year Warranty

Jewelry Made By Hand in Italy

Designed By Women for Women

What Our Customers Say

★★★★★

Customer service was next level, Milena and her team really care about the whole buying experience. The Capri Studs I got for myself are my everyday go-to, I love them. Thank you so much!

Sophie S.

Zurich, Switzerland

★★★★★

I chose the Paros Eternity Ring to exchange on our wedding day this summer, and I couldn’t be happier. Milena and her team made the entire experience unforgettable. They truly care about their customers, guiding me with patience and expertise to find the perfect ring. The love they put into the process made all the difference—I know I made the best choice. I can’t wait for our big day!

Corinne F.

Zug, Switzerland

★★★★★

I got the Patmos Heart Necklace as a gift for my wife to celebrate the birth of our son. She loved it. I could not have asked for a better experience, from choosing the perfect diamond to communication around the whole production process was seamless and thoughtful. Can 100% recommend working with Milena.

Gian K.

Pfäffikon, Switzerland

★★★★★

Love the contemporary designs and everything this brand stands for. Will not leave the house without my stunning Naxos Studs and got so many compliments already!

Katherina M.

Thalwil

★★★★★

I had never bought a diamond before, so the thought of choosing the perfect engagement ring felt overwhelming—until I found Mimi. From the very first consultation, the team guided me through every step, explaining diamond quality, settings, and styles with incredible patience and expertise.

What truly set them apart was the option to create a dupe ring in silver with Cubic Zirconia, allowing my fiancée to see and try it before we ordered the final piece in 18K gold with a stunning diamond. This gave us both confidence that it was exactly what she wanted.

When the real ring arrived, she was absolutely in love—and so was I. The entire process was seamless, personalized, and stress-free. Milena didn’t just "sell" me a ring; they made sure I understood and felt confident in my choice. I couldn’t be happier! Thank you so much.

Robert F.

Binningen, Switzerland

★★★★★

Absolutely stunning! I got the Capri Necklace for my birthday - the diamonds sparkle beautifully and the buying process was perfect, from start to finish. Thank you to Milena and her whole team.

Isabelle F.

Zurich

★★★★★

I wanted to celebrate my promotion with something meaningful, and the Patmos Eternity Ring was the perfect choice. The consultation process was seamless—Mimi’s team helped me find the ideal ring that matched my style. The brilliance of the laboratory-grown diamonds and the elegance of the design exceeded my expectations. Every time I look at it, I’m reminded of my hard work and achievements. I couldn’t be happier with my purchase!

Olivia R.

Kilchberg, Switzerland

★★★★★

I bought the Initial Bracelet as a personal reminder of my son, and I couldn’t love it more. The craftsmanship is stunning, and the design is elegant yet meaningful. The team at Mimi made the experience special, ensuring every detail was perfect, even the fit was made to measure. Every time I wear it, I feel connected to him—it’s more than jewelry; it’s a piece of my heart.

Nadja L.

Lausanne, Switzerland

★★★★★

I wasn’t sure what to get my fiancée for our anniversary, but the consultation via web-call made all the difference. They guided me through every detail, helping me choose the St. Tropez Pear Necklace—a perfect, timeless piece. Seeing her reaction made the whole experience unforgettable.

Raphael k.

Zollikon

Leading With Change In Mind

As we evolve, our goal
is to achieve full sustainability by using diamonds and gemstones created with renewable energy, recycled solid gold, and working with local producers and goldsmiths to preserve and support a centuries-old craft.

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Or simply book an appointment with our team and we'll be delighted to help you make all your diamond dreams come true.

We can't wait to meet you personally.

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Every Stone Is Hand Selected

All our diamonds come in the best color grading D/E/F (white), with a clarity of VVS/VS (no visible inclusions for the naked eye) and they are IGI/GIA/HRD certified from 0.5 carat.

Learn More

Our Mission

IRALIS exists to break free from opaque diamond supply chains and outdated norms.

Empowering women with jewelry - and beyond.

With transparency, integrity, and exceptional craftsmanship at it’s core, our brand seeks to empower women to express their strength, values, and individuality with confidence.

Our Promise

Exceptional quality - nothing less.

Handcrafted with love and passion.

Lab-grown diamonds, certified by GIA or IGI.

Each diamond is hand-selected by qualified diamond experts.

We exclusively use 14k and 18k solid gold or platinum.

Designed with precision in the capital of luxury jewelry and watches - Switzerland.v

Frequently Asked Questions

Absolutely! Lab-grown diamonds are identical to mined diamonds, boasting the same chemical composition, crystal structure, and physical properties as their natural counterparts. The primary difference lies in their origin and the age of the carbon atoms. Only through using advanced technology, we can determine whether a diamond is from a lab or mined from the Earth.

Yes, they come in all different shapes, color and inclusion grades! Lab-grown diamonds can exhibit inclusions just like natural diamonds. This is a result of the growth process involved in their creation. During production in a controlled laboratory setting, fluctuations in temperature and pressure, impurities in the growth chamber, or interruptions can lead to the formation of inclusions. While inclusions are less common in lab-grown diamonds than in natural ones, they can still occur and vary in type, size, and visibility.

Lab-grown diamonds showcase the same exceptional hardness and durability as natural diamonds, earning a perfect score of 10 on the Mohs scale of mineral hardness. This means they are highly resistant to scratching and wear, making them ideal for everyday jewelry pieces like engagement rings, earrings, and bracelets.

The CVD Method

In the CVD (Chemical Vapor Deposition) process, a tiny diamond seed is placed in a vacuum chamber filled with carbon-rich gases. Once heated to extreme temperatures, the gas transforms into plasma, causing carbon particles to break free. These particles settle on the diamond seed, allowing it to grow into a magnificent gem.

The HPHT Method

The HPHT (High Pressure High Temperature) technique involves placing a diamond seed in carbon—the very material diamonds are made of. Subjected to intense heat and pressure, this method replicates the natural conditions under which diamonds form. As the carbon melts, it envelops the seed, and when it cools, a stunning diamond is born.

Yes! Lab-grown diamonds offer an ethical alternative to traditional diamonds. They don’t inflict the same environmental damage as diamond mining and are free from the ethical concerns such as blood diamonds, labor practices, community displacement and economic exploitations sometimes linked to natural diamonds.

Lab-grown diamonds not only provide an ethical and environmentally friendly choice, but they also offer incredible value for money without sacrificing quality.

The quality of lab-grown diamonds is assessed using the same criteria as natural diamonds—the renowned 4 C’s: Cut, Color, Clarity, and Carat weight.

The globally leading independent certification bodies, that also grade mined diamonds are IGI and GIA. An IGI or GIA report is the universal language of trust in the gemological world, ensuring your diamond's quality and authenticity.

Lab-grown diamonds undergo a careful transformation similar to natural diamonds, ensuring they shine beautifully in every piece of jewelry. The process starts with cutting, where skilled gem cutters shape the rough diamond to enhance its brilliance. Next, the diamond is polished to eliminate imperfections and maximize its shine.

Insured Express Shipping Is On Us

2 Year Warranty & Diamond Certificate

Carefully Designed In Switzerland

What Our Customers Say

★★★★★

Absolutely stunning! I got the Capri Necklace for my birthday - the diamonds sparkle beautifully and the buying process was perfect, from start to finish. Thank you to Milena and her whole team.

Isabelle F.

Zurich

★★★★★

I wasn’t sure what to get my fiancée for our anniversary, but the consultation via web-call made all the difference. They guided me through every detail, helping me choose the St. Tropez Pear Necklace—a perfect, timeless piece. Seeing her reaction made the whole experience unforgettable.

Raphael k.

Zollikon

★★★★★

I got the Patmos Heart Necklace as a gift for my wife to celebrate the birth of our son. She loved it. I could not have asked for a better experience, from choosing the perfect diamond to communication around the whole production process was seamless and thoughtful. Can 100% recommend working with Milena.

Gian K.

Pfäffikon, Switzerland

★★★★★

Customer service was next level, Milena and her team really care about the whole buying experience. The Capri Studs I got for myself are my everyday go-to, I love them. Thank you so much!

Sophie S.

Zurich, Switzerland

★★★★★

I chose the Paros Eternity Ring to exchange on our wedding day this summer, and I couldn’t be happier. Milena and her team made the entire experience unforgettable. They truly care about their customers, guiding me with patience and expertise to find the perfect ring. The love they put into the process made all the difference—I know I made the best choice. I can’t wait for our big day!

Corinne F.

Zug, Switzerland

★★★★★

Love the contemporary designs and everything this brand stands for. Will not leave the house without my stunning Naxos Studs and got so many compliments already!

Katherina M.

Thalwil

★★★★★

I had never bought a diamond before, so the thought of choosing the perfect engagement ring felt overwhelming—until I found Mimi. From the very first consultation, the team guided me through every step, explaining diamond quality, settings, and styles with incredible patience and expertise.

What truly set them apart was the option to create a dupe ring in silver with Cubic Zirconia, allowing my fiancée to see and try it before we ordered the final piece in 18K gold with a stunning diamond. This gave us both confidence that it was exactly what she wanted.

When the real ring arrived, she was absolutely in love—and so was I. The entire process was seamless, personalized, and stress-free. Milena didn’t just "sell" me a ring; they made sure I understood and felt confident in my choice. I couldn’t be happier! Thank you so much.

Robert F.

Binningen, Switzerland

★★★★★

I wanted to celebrate my promotion with something meaningful, and the Patmos Eternity Ring was the perfect choice. The consultation process was seamless—Mimi’s team helped me find the ideal ring that matched my style. The brilliance of the laboratory-grown diamonds and the elegance of the design exceeded my expectations. Every time I look at it, I’m reminded of my hard work and achievements. I couldn’t be happier with my purchase!

Olivia R.

Kilchberg, Switzerland

★★★★★

I bought the Initial Bracelet as a personal reminder of my son, and I couldn’t love it more. The craftsmanship is stunning, and the design is elegant yet meaningful. The team at Mimi made the experience special, ensuring every detail was perfect, even the fit was made to measure. Every time I wear it, I feel connected to him—it’s more than jewelry; it’s a piece of my heart.

Nadja L.

Lausanne, Switzerland

Oval cut three-stone engagement ring by IRALIS featuring lab-grown diamonds in DEF color and VS1–VS2 clarity, Zurich designed
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Oval cut three-stone engagement ring by IRALIS featuring lab-grown diamonds in DEF color and VS1–VS2 clarity, Zurich designed
Next: Rose Ring