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Cushion|Lab Grown|GCAL

1.51ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • GCAL 301390008

Certificate GCAL 301390008

Diamond specifications and retailer prices

From £453 GBP
$608 USD
As of November 1, 2026
Save £1,529 GBP (77%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,982 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GCAL 301390008. Listed at 3 retailers as of November 1, 2026, with prices from £453 to £1,982, a £1,529 spread on the same certified stone. Do Amore Diamonds lists it at £1,982. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginLab Grown
Grading LabGCAL
CertificateGCAL 301390008
Dimensions7.00 × 6.47 × 4.38 mm
L/W Ratio1.08
Top View
7.00 mm6.47 mm1.51 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGCAL 301390008
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,982 GBP|Low: £434 GBP|High: £1,982 GBP|Avg: £930 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
October 25, 2026
Retailer 3£453 GBP
Retailer 4£474 GBP
Retailer 2£1,228 GBP
Do Amore Diamonds£1,982 GBP

10 data points across 4 retailers

3 retailers£453 GBP to £1,982 GBP

B+
Cheapest Retailer
-
£453 GBP
$608 USD
B
Retailer 2
-
£1,228 GBP
View
Price last confirmed 7 days ago
Most Expensive
C
Do Amore Diamonds
27-2FB0909E3 · Nov 2
£1,982 GBP
$2,660 USD
View
2 more retailers have this diamond
Prices start from £453 GBPSave up to £1,529 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Cushion
£453 GBP