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Cushion|Lab Grown|IGI

1.29ct H VS1 Cushion Lab Grown Diamond

VG • H/VS1 • IGI LG648417577

Certificate IGI LG648417577

Diamond specifications and retailer prices

From £495 GBP
As of November 3, 2026
Save £194 GBP (28%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £689 GBP at Zales · As of November 4, 2026
View at Zales

About this 1.29ct lab-grown cushion diamond

This 1.29ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG648417577 or 648417577. Listed at 4 retailers as of November 3, 2026, with prices from £495 to £689, a £194 spread on the same certified stone. Zales lists it at £689. 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

1.29
Carat
H
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG648417577
Dimensions7.50 × 6.03 × 3.86 mm
L/W Ratio1.24
Top View
7.50 mm6.03 mm1.29 ctH / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648417577
Side View
Table 62.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.0%

Caratlytics Score

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

Price History

Last verified: Nov 3
Current: £495 GBP|Low: £495 GBP|High: £867 GBP|Avg: £718 GBP
Retailer 1
Retailer 2
Retailer 3
Zales
September 26, 2026
Retailer 1£495 GBP
Retailer 3£578 GBP
Retailer 2£689 GBP
Zales£689 GBP

12 data points across 4 retailers

4 retailers£495 GBP to £689 GBP

B+
Cheapest Retailer
-
£495 GBP
B
Retailer 2
-
£578 GBP
View
B
Retailer 3
-
£689 GBP
View
Most Expensive
B
Zales
521683214 · Nov 4
£689 GBP
$930 USD
View
3 more retailers have this diamond
Prices start from £495 GBPSave up to £194 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+
1.29ct Cushion
£495 GBP