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Cushion|Lab Grown|GIA

1.51ct I SI1 Cushion Lab Grown Diamond

VG • I/SI1 • GIA 2155860522

Certificate GIA 2155860522

Diamond specifications and retailer prices

From £7,269 GBP
As of November 6, 2026
Save £239 GBP (3%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £7,508 GBP at Jared · As of November 6, 2026
View at Jared

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2155860522. Listed at 3 retailers as of November 6, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 2155860522
Dimensions6.69 × 6.52 mm
L/W Ratio1.03
Top View
6.69 mm6.52 mm1.51 ctI / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2155860522
Side View
Table 56.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £7,508 GBP|Low: £7,269 GBP|High: £7,516 GBP|Avg: £7,354 GBP|-0.1%
Jared
Retailer 2
Retailer 3
June 25, 2026
Retailer 2£7,269 GBP
Retailer 3£7,269 GBP
Jared£7,508 GBP

5 data points across 3 retailers

3 retailers£7,269 GBP to £7,508 GBP

B
Cheapest Retailer
-
£7,269 GBP
B
Retailer 2
-
£7,269 GBP
View
Most Expensive
C
Jared
146175572 · Nov 6
£7,508 GBP
$10,050 USD
View
2 more retailers have this diamond
Prices start from £7,269 GBPSave up to £239 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
£7,269 GBP