Cushion|Lab Grown|IGI

2.54ct G SI1 Cushion Lab Grown Diamond

GD • G/SI1 • IGI LG715508541

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG715508541

Diamond specifications and retailer prices

From £378 GBP
As of October 30, 2026
Save £615 GBP (62%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,388 GBP at Rare Carat · As of September 23, 2026
View at Rare Carat

About this 2.54ct lab-grown cushion diamond

This 2.54ct lab-grown cushion sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG715508541 or 715508541. Listed at 13 retailers as of October 30, 2026, with a 163% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.54
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle40.8°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG715508541
Dimensions9.36 × 6.30 × 4.85 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.36 mm6.30 mm2.54 ctG / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG715508541
Side View
Table 61.0%Crown 40.8°Girdle: MED-VTKPavilion 36.7°Culet: NoneDepth 77.0%

Caratlytics Score

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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: Oct 30
Current: £1,388 GBP|Low: £299 GBP|High: £1,388 GBP|Avg: £671 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 11£299 GBP
Retailer 7£378 GBP
Retailer 9£382 GBP
Retailer 6£464 GBP
Retailer 8£466 GBP
Retailer 3£521 GBP
Retailer 4£529 GBP
Retailer 2£552 GBP
Retailer 5£865 GBP
Retailer 10£1,204 GBP
Rare Carat£1,388 GBP

34 data points across 11 retailers

13 retailers£378 GBP to £994 GBP

Retailer 1
-
£299 GBP
$401 USD
Price last confirmed 21 days ago
B+
Retailer 2
-
£378 GBP
View
B+
Retailer 3
-
£382 GBP
HK$4,000 HKD
View
B
Retailer 4
-
£464 GBP
$622 USD
View
B+
Retailer 5
-
£466 GBP
$625 USD
View
B+
Retailer 6
-
£521 GBP
$699 USD
View
B+
Retailer 7
-
£529 GBP
View
B+
Retailer 8
-
£552 GBP
€706 EUR
View
B+
Retailer 9
-
£620 GBP
$832 USD
View
B
Retailer 10
-
£865 GBP
$1,161 USD
View
B
Retailer 11
-
£994 GBP
$1,333 USD
View
Retailer 12
-
£1,204 GBP
View
Price last confirmed 14 days ago
Most Expensive
Rare Carat
335415085UB715 · Sep 23
£1,388 GBP
$1,862 USD
View
Price last confirmed 40 days ago
12 more retailers have this diamond
Prices start from £378 GBPSave up to £615 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+
2.54ct Cushion
£378 GBP