Grown on Earth,
Brilliant as the Stars.
Ethically created Lab Diamonds and Moissanite, hand-set into bespoke fine jewellery on the Gold Coast — every gemstone backed by a lifetime warranty.
Find Your Piece
From ready-to-ship designs to fully bespoke commissions — every category, one place to start.
Which Stone Is Right For You?
Every gemstone we sell is internationally certified. Here's an honest look at the differences.
Moissanite
- Exceptional brilliance, distinct fire
- 9.25 on the Mohs hardness scale
- Most accessible price point
- Independently certified, just like our diamonds
Lab Diamond
- Chemically identical to a mined diamond
- Same 4Cs grading, GIA/IGI certified
- 70–80% less than a natural diamond
- Created, not mined — lower footprint
Natural Diamond
- Formed over billions of years underground
- Available on request, quoted per stone
- Highest resale recognition
- Price on Carat, Colour, Cut and Clarity
Loved Designs
1.2ct Engagement Ring — Lab Diamond or Moissanite
5 Gemstone 2.5ct Cushion Ring
Cushion Cut 5.87ct Engagement Ring
Cushion Cut Solitaire 2.95ct Ring
The Custom Design Journey
Every custom piece follows the same considered path, from first conversation to the ring on your finger.
Consult
Tell us your vision — in person, by video, or by email.
Choose Your Stone
Lab diamond, natural diamond, or moissanite — all certified over 0.5ct.
Approve the Design
We confirm setting, metal, and sizing before we begin.
Delivered to You
Handcrafted in 15–20 business days, insured worldwide shipping.
What Our Customers Say
"I would like to say a HUGE thank you. As the engagement ring is a surprise for my girlfriend (haven't proposed yet), the whole process was seamless from start to finish. Highly recommend Interstella Diamonds."
"The ring itself? Absolutely flawless. The diamond is breathtaking and the craftsmanship is second to none."
"My ring is beautiful and I am very happy with the quality. It is honestly exactly what I wanted and it is just perfect."
20+ Years of Bringing Light to Life
Interstella Diamonds was built on a simple belief: exceptional gemstones shouldn't come with compromise — on quality, on ethics, or on price. For over two decades we've hand-selected and set lab-grown diamonds, natural diamonds, and moissanite from our home on the Gold Coast.
Every piece is made to order, backed by a lifetime warranty, and shipped insured, wherever you are in the world.
Join the Interstella Circle
Get 10% off your first order, plus early access to new designs.