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Cushion|Lab Grown|IGI

2.70ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG519231185

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG519231185

Diamond specifications and retailer prices

From £1,582 GBP
$2,120 USD
As of October 31, 2026
Save £3,248 GBP (67%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £5,771 GBP at Loose Grown Diamond · As of November 1, 2026
View at Loose Grown Diamond

About this 2.7ct lab-grown cushion diamond

This 2.7ct lab-grown cushion sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG519231185 or 519231185. Listed at 7 retailers as of October 31, 2026, with a 205% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.70
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519231185
Dimensions8.29 × 7.89 × 4.90 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.29 mm7.89 mm2.70 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519231185
Side View
Table 64.0%Crown 32.7°Girdle: STK-VTKPavilion 34.6°Culet: NoneDepth 62.1%

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: Oct 31
Current: £5,771 GBP|Low: £1,582 GBP|High: £7,824 GBP|Avg: £4,436 GBP|+0.3%
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4£1,582 GBP
Retailer 6£3,600 GBP
Retailer 5£3,729 GBP
Retailer 7£3,762 GBP
Retailer 3£4,830 GBP
Loose Grown Diamond£5,771 GBP
Retailer 2£7,721 GBP

39 data points across 7 retailers

7 retailers£1,582 GBP to £4,830 GBP

B+
Cheapest Retailer
-
£1,582 GBP
$2,120 USD
B
Retailer 2
-
£3,600 GBP
$4,823 USD
View
Final sale: no returns
Retailer 3
-
£3,729 GBP
$4,996 USD
View
Price last confirmed 19 days ago
B
Retailer 4
-
£3,762 GBP
$5,040 USD
View
B
Retailer 5
-
£4,830 GBP
View
Most Expensive
Loose Grown Diamond
519231185 · Nov 1
£5,771 GBP
$7,733 USD
View
Price under review
5 more retailers have this diamond
Prices start from £1,582 GBPSave up to £3,248 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+
2.70ct Cushion
£1,582 GBP