Callista Mosaic – 1.20ct Lab Grown Diamond Necklace
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A celebration of structure, symmetry and sculptural beauty.
The Callista Mosaic Necklace features a curated arrangement of mixed-cut lab grown diamonds totalling 1.20ct, each precision-set within clean, architectural gold frames. Emerald, heart, round and geometric silhouettes sit in deliberate balance — a modern mosaic inspired by the symmetry of classical Greek design.
Unlike traditional linear diamond necklaces, Callista Mosaic is designed with intention. Each shape represents contrast and harmony — strength and softness, edge and curve — unified in a single sculptural composition.
Crafted in your choice of 9ct or 18ct white, yellow or rose gold, this piece is designed to sit elegantly along the collarbone, offering brilliance without excess. Refined yet distinctive, it transitions seamlessly from day styling to evening statement.
Set exclusively with ethical lab grown diamonds, this necklace delivers the fire and clarity of natural diamonds with a more sustainable footprint.
Details:
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Total Diamond Weight: 1.20ct
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Diamond Type: Lab Grown
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Available in: 9ct & 18ct White, Yellow or Rose Gold
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Modern mixed-cut diamond design
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Designed in the Birmingham Jewellery Quarter
THE FOUR PILLARS
Every Astella fine jewellery piece is available in sterling silver, 18ct yellow gold, and 18ct rose gold.
Each piece is finished by hand in Birmingham's Jewellery Quarter, where the same care given to our engagement rings goes into every fine jewellery piece we make.
All Astella fine jewellery is set with lab-grown diamonds, real diamonds in every sense, with the same optical, physical, and chemical properties as mined stones. Lab-grown diamonds allow us to offer exceptional quality at a price that reflects the craft, not the mining. Every stone is hand-selected by our team before it goes into your piece.
Every Astella piece is covered by our Ever After Lifetime Guarantee, a commitment to the quality of our craftsmanship for as long as you own the piece. If something isn't right, we'll always make it right. We're based in Birmingham's Jewellery Quarter and you're welcome to bring your piece in at any time for a professional clean and polish.
All Astella pieces are made to order and typically ready within 4–6 weeks. Your order is delivered via Royal Mail Special Delivery, fully insured and tracked from our studio to your door.
Packaging is plain and unmarked on the outside. To keep your piece looking its best, store it separately in the Astella box it arrives in and avoid contact with perfume, lotions, and water where possible. We're always here if you need advice on caring for your piece, reach us on WhatsApp or Email.
Discreet Delivery
Your order arrives in plain, unmarked packaging — no Astella branding on the outside, and the return address uses a personal name. Perfect for keeping a surprise exactly that.
Drop a hint
A celebration of structure, symmetry and sculptural beauty.
The Callista Mosaic Necklace features a curated arrangement of mixed-cut lab grown diamonds totalling 1.20ct, each precision-set within clean, architectural gold frames. Emerald, heart, round and geometric silhouettes sit in deliberate balance — a modern mosaic inspired by the symmetry of classical Greek design.
Unlike traditional linear diamond necklaces, Callista Mosaic is designed with intention. Each shape represents contrast and harmony — strength and softness, edge and curve — unified in a single sculptural composition.
Crafted in your choice of 9ct or 18ct white, yellow or rose gold, this piece is designed to sit elegantly along the collarbone, offering brilliance without excess. Refined yet distinctive, it transitions seamlessly from day styling to evening statement.
Set exclusively with ethical lab grown diamonds, this necklace delivers the fire and clarity of natural diamonds with a more sustainable footprint.
Details:
-
Total Diamond Weight: 1.20ct
-
Diamond Type: Lab Grown
-
Available in: 9ct & 18ct White, Yellow or Rose Gold
-
Modern mixed-cut diamond design
-
Designed in the Birmingham Jewellery Quarter
Every Astella fine jewellery piece is available in sterling silver, 18ct yellow gold, and 18ct rose gold.
Each piece is finished by hand in Birmingham's Jewellery Quarter, where the same care given to our engagement rings goes into every fine jewellery piece we make.
All Astella fine jewellery is set with lab-grown diamonds, real diamonds in every sense, with the same optical, physical, and chemical properties as mined stones. Lab-grown diamonds allow us to offer exceptional quality at a price that reflects the craft, not the mining. Every stone is hand-selected by our team before it goes into your piece.
Every Astella piece is covered by our Ever After Lifetime Guarantee, a commitment to the quality of our craftsmanship for as long as you own the piece. If something isn't right, we'll always make it right. We're based in Birmingham's Jewellery Quarter and you're welcome to bring your piece in at any time for a professional clean and polish.
All Astella pieces are made to order and typically ready within 4–6 weeks. Your order is delivered via Royal Mail Special Delivery, fully insured and tracked from our studio to your door.
Packaging is plain and unmarked on the outside. To keep your piece looking its best, store it separately in the Astella box it arrives in and avoid contact with perfume, lotions, and water where possible. We're always here if you need advice on caring for your piece, reach us on WhatsApp or Email.
Discreet Delivery
Your order arrives in plain, unmarked packaging — no Astella branding on the outside, and the return address uses a personal name. Perfect for keeping a surprise exactly that.
Drop a hint
Frequently asked questions
Absolutely. All Astella pieces arrive in our signature gift box, ready to give. If you'd like to keep the delivery a surprise, our outer packaging is plain and unmarked with no Astella branding on the outside. You can also use the Drop a Hint feature on any product page to share a piece with someone special.
Yes. All Astella fine jewellery is set with lab-grown diamonds, real diamonds with the same physical, chemical, and optical properties as mined stones. The only difference is how they're created. Explore our Lab-Grown Diamond Guide.
Yes. Astella offers a bespoke jewellery service, allowing you to personalise or commission a custom-made piece tailored to your vision. From stone selection to design refinement, our specialists guide you through every stage of the process. Explore bespoke jewellery to begin creating something truly personal.
Every piece we make is covered by our Ever After Lifetime Guarantee, a lifetime commitment to the quality of our craftsmanship. If something isn't right with your piece, we'll always make it right.
Reach us on WhatsApp or at hello@astellajewellery.co.uk and we'll take care of it.
