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Round|Lab Grown|IGI

2.50ct E SI2 Round Lab Grown Diamond

EX • E/SI2 • IGI LG459132301

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459132301

Diamond specifications and retailer prices

From £2,170 GBP
$2,890 USD
As of October 29, 2026
Save £1,137 GBP (34%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,543 GBP at Friendly Diamonds · As of October 26, 2026
View at Friendly Diamonds

About this 2.5ct lab-grown round diamond

This 2.5ct lab-grown round sits in the two to three carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459132301 or 459132301. Listed at 12 retailers as of October 29, 2026, with a 52% 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

2.50
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459132301
Dimensions8.68 × 8.65 × 5.46 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.68 mm8.65 mm2.50 ctE / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459132301
Side View
Table 54.0%Crown 33.2°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 63.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £4,543 GBP|Low: £2,170 GBP|High: £7,436 GBP|Avg: £4,395 GBP
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6£2,170 GBP
Retailer 5£2,953 GBP
Retailer 9£3,307 GBP
Retailer 7£3,426 GBP
Retailer 10£3,426 GBP
Retailer 3£4,475 GBP
Friendly Diamonds£4,543 GBP
Retailer 8£5,306 GBP
Retailer 2£5,928 GBP
Retailer 4£7,377 GBP

45 data points across 10 retailers

12 retailers£2,170 GBP to £3,307 GBP

B
Cheapest Retailer
-
£2,170 GBP
$2,890 USD
B
Retailer 2
-
£2,953 GBP
$3,933 USD
View
B
Retailer 3
-
£3,095 GBP
$4,121 USD
View
B
Retailer 4
-
£3,307 GBP
$4,404 USD
View
Final sale: no returns
Retailer 5
-
£3,426 GBP
$4,562 USD
View
Price under review
Retailer 6
-
£3,426 GBP
$4,562 USD
View
Price under review
Retailer 7
-
£4,281 GBP
$5,701 USD
View
Price under review
Retailer 8
-
£4,475 GBP
View
Price under review
Most Expensive
Friendly Diamonds
1580358 · Oct 26
£4,543 GBP
$6,050 USD
View
Price under review
8 more retailers have this diamond
Prices start from £2,170 GBPSave up to £1,137 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
2.50ct Round
£2,170 GBP