LGD-LAB-10ct

Lab-Grown Loose Octagon Cut Diamond

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Complimentary delivery or collect in-store. Your diamond will be shipped within 3 to 5 business days.

Eight-Sided Distinction

The octagon cut is an eight-sided diamond that bridges the gap between round and square shapes. Its symmetrical geometry and step-cut or brilliant faceting create a distinctive profile that offers the best of both worlds - geometric precision with well-rounded light performance.

Why Choose an Octagon Cut?

  • Geometric Balance - Eight equal sides create perfect symmetry with a unique visual identity
  • Versatile Aesthetic - Sits between round softness and square angularity for broad appeal
  • Distinctive Setting Options - The eight-sided profile inspires creative bezel and halo designs

Available Sizes

Available in 1.0ct through to 5.0ct in half-carat increments. For stones above 5.0ct, please contact us for a custom quote.

All stones are sourced to order. Typical lead time is 5-10 business days depending on specifications.

Every CRTD diamond is independently certified by IGI or GIA. Our lab-grown diamonds are chemically, physically, and optically identical to mined diamonds - the only difference is their origin. All stones meet our minimum VS1 clarity standard, ensuring exceptional brilliance and fire.

Clean your diamond gently with warm water and mild soap using a soft brush. Store separately in a lined case to prevent scratching. Remove before exposure to harsh chemicals or strenuous activity. Professional cleaning is recommended annually to maintain optimal brilliance.

Sourced to order with an estimated lead time of up to four weeks. Every diamond ships via insured courier within Australia. Full details on returns and our commitment to your satisfaction are available in our shipping policy.

The Diamond

Lab-Grown Loose Octagon Cut Diamond

The octagon diamond is an eight-sided stone that occupies the geometric middle ground between a round and a square. Its equal-length sides and uniform internal angles create a shape of perfect symmetry, offering the softness of curved forms with the definition of angular ones. This balanced geometry makes the octagon a versatile choice that appeals to a wide range of aesthetic preferences.
Heritage & Craft

Origin

Octagonal diamond cutting draws on the long tradition of step-cut gemstone shapes, where geometric forms were chosen to maximise both beauty and material efficiency. The octagon has been a popular shape in coloured gemstone cutting for centuries - particularly for emeralds, which are commonly cut in octagonal step-cut form. Applied to diamonds, the octagon brings that same sense of classical proportion and geometric harmony, updated with modern cutting precision.

How It's Shaped

The octagon features eight sides of equal or near-equal length, creating a regular polygon with uniform 135-degree internal angles. It can be faceted in either step-cut or brilliant style depending on the desired optical effect. Step-cut octagons emphasise clarity and geometric purity, while brilliant-cut versions deliver more traditional sparkle. The eight-sided perimeter provides natural seats for bezel settings and inspires creative halo designs that follow the stone's unique outline.
Why This Cut
The octagon diamond offers a distinctive visual identity while remaining accessible and wearable. Its eight-sided form is immediately recognisable yet not so unconventional as to limit setting options. The shape's inherent symmetry makes it satisfying to the eye from every angle, and its balanced proportions sit beautifully on the hand. For buyers drawn to geometric shapes who find hexagons too angular and rounds too conventional, the octagon is the ideal middle path.

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