How many facets does a radiant cut diamond have?

A radiant cut diamond has 70 facets — more than most other diamond shapes. This high facet count produces an intense crushed-ice sparkle that is unlike anything a round or oval diamond delivers.

What is the ideal Table% for a radiant cut diamond?

The ideal Table% for a radiant cut diamond is 60% to 66%. This range balances brilliance and fire, ensuring the stone reflects light efficiently.

What is the ideal Depth% for a radiant cut diamond?

The ideal Depth% for a radiant cut diamond is 59% to 65%. Stones within this range optimise light performance without appearing too deep or too shallow.

What length-to-width ratio should I choose for a radiant cut diamond?

For a square radiant cut diamond, look for a length-to-width ratio of 1.00 to 1.05. For the classic rectangular radiant look, a ratio of 1.20 to 1.35 is ideal. The choice depends on personal preference.

LAB CREATED DIAMONDS

Radiant Cut Diamonds

Q: Does a radiant cut diamond have a GIA cut grade?

No. The GIA does not assign an overall cut grade to radiant cut diamonds. This makes proportions your primary tool for identifying a well-cut stone. Always use Table%, Depth%, and length-to-width ratio as a filter before shortlisting stones.

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.

Proportion	Ideal range	Why it matters
Table %	60% – 66%	Balances brilliance and fire
Depth %	59% – 65%	Optimises light performance
Length to width SQ	1.00 – 1.05
Length to width Rect.	1.20 – 1.35
Polish & symmetry	Excellent	Maximises light return
Girdle	Thin – Thick	Protects the diamond’s edge