radiant cut diamond ring

LAB CREATED DIAMONDS

Radiant Cut Diamonds

The radiant cut has 70 facets — more than most other shapes — which produces an intense, crushed-ice sparkle that is unlike anything a round or oval delivers. A rectangular radiant is a compelling choice for anyone drawn to the elegant outline of an emerald cut but who wants the brilliance of a round diamond.
The radiant carries no official cut grade on a GIA report, which makes proportions your primary tool for identifying a well-cut stone. The length-to-width ratio defines the overall shape — 1.00 to 1.05 produces a square outline, while 1.20 to 1.35 gives the classic rectangular look. Because the majority of fancy cut lab diamonds on the market are poorly proportioned, always use the table below as a filter before shortlisting stones.

Beyond the 4Cs: Use the
proportions table to identify the
finest stones in our collection.

ProportionIdeal rangeWhy it matters
Table %60% – 66%Balances brilliance and fire
Depth %59% – 65%Optimises light performance
Length to width SQ1.00 – 1.05
Length to width Rect.1.20 – 1.35
Polish & symmetryExcellent Maximises light return
GirdleThin – ThickProtects the diamond’s edge
Filters
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Shape
  • Round
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  • Princess
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  • Pear
  • Marquise
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  • Radiant
Carat
Price
Colour
  • D
  • E
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Clarity
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  • IF
  • VVS1
  • VVS2
  • VS1
  • VS2
  • SI1
Cut
  • Ideal
  • Excellent
Polish
  • Excellent
Symmetry
  • Excellent
Fluorescence
  • None
Report
  • GIA
  • IGI
Depth
Table
L/W Ratio

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