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Cushion|Lab Grown|GCAL

2.51ct F SI1 Cushion Lab Grown Diamond

F/SI1

Diamond specifications and retailer prices

From $2,963 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $2,963 USD at Helzberg Diamonds
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Helzberg Diamonds

About this 2.51ct lab-grown cushion diamond

This 2.51ct lab-grown cushion sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included) and certified by GCAL. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.51
Carat
F
Color
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGCAL
Dimensions9.12 × 7.53 mm
L/W Ratio1.21
Top View
9.12 mm7.53 mm2.51 ctF / SI1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGCAL
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.1%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 2
Current: $2,963 USD|Low: $2,963 USD|High: $3,269 USD|Avg: $3,126 USD|-5.8%
September 23, 2026
Helzberg Diamonds$2,963 USD

3 data points across 1 retailer

1 retailer

C
Helzberg Diamonds
XTRcJJJJHGIHI · Nov 2
$2,963 USD
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C
2.51ct Cushion
$2,963 USD