The Solstice Tennis Necklace is a continuous line of round brilliant lab grown diamonds set into a flexible link structure that sits flush against the collarbone and moves naturally as it's worn. Each diamond is matched for size and quality: this is to why the band appears as a single, unbroken band of uniform brilliance. The flexible link structure keeps the necklace close to the body, giving it comfort and presence without weight.
Our Customers said
Our brand lives through the personal stories and milestones you entrust to us. We believe that confidence comes from making a decision that feels unmistakably right, and we are moved by the partnership we share with every individual.
Lisa
"My partner proposed with the most beautiful ring. Every time I look at it, I just smile."
Sarah
"Really impressed with the whole process. The team helped me through everything and when the earrings arrived they sparkled even more than I expected."
James
"I didn't just want to spend money on a ring that felt generic. The collection from bonded matter looked very special and luxurious - more of the vibe I was looking for - now I'm really happy with where I landed."
Urike
"I wanted a special heirloom piece that felt like me but that I could also pass on to my children one day."
Julie
"I got the necklace for my birthday from my parents and now it just became part of my personality - I love that the color is so special and the sparkle is unreal!!"
Tom
"I'd been reading up on lab grown diamonds for a while before I got in touch. Really glad I went with Bonded Matter - the quality is clear and they were upfront about everything."
Sophie
"I love my first milestone piece!! I spend a long time thinking about this ring and now that I ordered and wear it every day, it makes me so happy I made the choice! "
Marco
"The whole experience felt personal, not transactional. They genuinely cared about helping me find the perfect piece."
Common questions
Every piece carries a lifetime warranty and 30-day returns. If something isn't right, we fix it.
How long does it take from order to delivery?
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How long does it take from order to delivery?
Every piece is made to order. Production is ca 4 weeks from confirmation. We give you a specific timeline when you order, not an estimate range.
Once the piece passes our final quality inspection, delivery is 2–7 business days depending on location with tracking at every stage.
What are your stone and metal standards?
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What are your stone and metal standards?
Every stone we carry is colourless to the eye and free of visible inclusions under any normal viewing conditions. That places every diamond we sell in the top 6% of stones globally. Stones over 1.00 carat are independently certified by the IGI, and the full grading report comes with the piece.
Every piece is made in 18K gold or 950PT platinum. There's no 14K.
We offer two diamond quality tiers. Signature Quality is what we recommend for almost everyone, and it's what we'd choose ourselves. Colourless, no visible inclusions under any normal conditions, cut to exacting proportions. It accounts for around 6% of lab grown stones globally.
Perfect Precision is the highest achievable grade across every measurable dimension: D colour, Flawless clarity, Ideal cut, polish, and symmetry. The difference from Signature Quality is real on paper and invisible in person. It's for customers who want to know their stone sits at the absolute ceiling of what's measurable.
Why lab grown diamonds?
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Why lab grown diamonds?
Lab grown diamonds have the same physical structure, chemical composition, and optical properties as diamonds formed in the earth. Created in controlled conditions, they deliver greater consistency in colour, clarity, and cut than the natural supply can reliably achieve.
Every stone we sell is graded to the same international standards used for any diamond in the industry. We work exclusively with lab grown because the process gives us complete control over quality from the start.
Can I create something custom?
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Can I create something custom?
Yes. Our concierge service is built for customers who want a piece that doesn't exist in the current range, or who want to work from a specific idea, reference, or story. You can start the conversation from your phone — no showroom visit, no appointment required.
What if something needs adjusting after I receive it?
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What if something needs adjusting after I receive it?
Every piece carries a lifetime warranty on materials and construction. If the fit isn't right, we resize it. If something needs attention, we handle it.
The 30-day return policy applies if the piece isn't what you expected — no forms, no friction.
IGI Certified Diamonds
We only work with stones in the top 6% globally, each independently graded by IGI.
Carbon Positive by Design
Every purchase offsets 1 tonne of CO₂ through native Australian reforestation.
Bonded Lifetime Promise
Built to wear for decades. Every piece is covered, for life.
30 Day Returns
If it's not right, we'll make it right. No friction, no pressure.