CaratHunter
Plans
Oval|Lab Grown|IGI

2.55ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG843606127

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG843606127

Diamond specifications and retailer prices

From £384 GBP
$515 USD
As of October 29, 2026
Save £1,982 GBP (84%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,687 GBP at Brilliant Earth · As of October 20, 2026
View at Brilliant Earth

About this 2.55ct lab-grown oval diamond

This 2.55ct lab-grown oval sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG843606127 or 843606127. Listed at 14 retailers as of October 29, 2026, with a 516% 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

2.55
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843606127
Dimensions11.28 × 7.67 × 4.78 mm
L/W Ratio1.47
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.28 mm7.67 mm2.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843606127
Side View
Table 58.0%Crown 36.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £447 GBP|Low: £302 GBP|High: £2,366 GBP|Avg: £778 GBP|+13.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 4£302 GBP
Retailer 7£384 GBP
Retailer 10£439 GBP
Retailer 1£447 GBP
Retailer 3£509 GBP
Retailer 2£568 GBP
Retailer 12£580 GBP
Retailer 9£968 GBP
Retailer 8£1,002 GBP
Retailer 13£1,082 GBP
Retailer 5£1,265 GBP
Retailer 6£1,646 GBP
Retailer 11£2,366 GBP

23 data points across 13 retailers

14 retailers£384 GBP to £2,366 GBP

A
Cheapest Retailer
-
£384 GBP
$515 USD
B+
Retailer 2
-
£439 GBP
$588 USD
View
A
Retailer 3
-
£447 GBP
View
Retailer 4
-
£568 GBP
View
Price last confirmed 13 days ago
A
Retailer 5
-
£580 GBP
$777 USD
View
B
Retailer 6
-
£968 GBP
$1,297 USD
View
B
Retailer 7
-
£1,002 GBP
$1,342 USD
View
B
Retailer 8
-
£1,082 GBP
$1,450 USD
View
Retailer 9
-
£1,265 GBP
View
Price last confirmed 19 days ago
B
Retailer 10
-
£1,646 GBP
$2,205 USD
View
Retailer 11
-
£1,881 GBP
$2,520 USD
View
Price last confirmed 13 days ago
B
Retailer 12
-
£2,037 GBP
$2,730 USD
View
B
Retailer 13
-
£2,366 GBP
$3,170 USD
View
Most Expensive
Brilliant Earth
21795752A · Oct 20
£2,687 GBP
$3,600 USD
View
Price last confirmed 10 days ago
13 more retailers have this diamond
Prices start from £384 GBPSave up to £1,982 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.

A
2.55ct Oval
£384 GBP