CaratHunter
Plans
Round|Lab Grown|IGI

2.55ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG485161729

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485161729

Diamond specifications and retailer prices

From £1,651 GBP
As of November 5, 2026
Save £3,530 GBP (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,181 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 2.55ct lab-grown round diamond

This 2.55ct lab-grown round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485161729 or 485161729. Listed at 9 retailers as of November 5, 2026, with prices from £1,651 to £5,181, a £3,530 spread on the same certified stone. MOH London lists it at £5,181. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485161729
Dimensions8.90 × 8.96 × 5.25 mm
L/W Ratio1.01
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
8.90 mm8.96 mm2.55 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485161729
Side View
Table 59.5%Crown 31.4°GirdlePavilion 40.4°Culet: NoneDepth 58.8%

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: Nov 5
Current: £5,181 GBP|Low: £1,651 GBP|High: £5,264 GBP|Avg: £2,950 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4£1,651 GBP
Retailer 5£1,915 GBP
Retailer 2£2,036 GBP
Retailer 7£2,444 GBP
Retailer 6£2,990 GBP
Retailer 3£3,001 GBP
MOH London£5,181 GBP

19 data points across 7 retailers

9 retailers£1,651 GBP to £5,181 GBP

A
Cheapest Retailer
-
£1,651 GBP
A
Retailer 2
-
£1,796 GBP
View
Retailer 3
-
£1,915 GBP
View
Price last confirmed 26 days ago
B+
Retailer 4
-
£1,915 GBP
View
B+
Retailer 5
-
£2,036 GBP
View
B
Retailer 6
-
£2,632 GBP
View
B
Retailer 7
-
£2,990 GBP
View
B
Retailer 8
-
£3,001 GBP
View
Most Expensive
B
MOH London
LG485161729 · Nov 5
£5,181 GBP
View
8 more retailers have this diamond
Prices start from £1,651 GBPSave up to £3,530 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 Round
£1,651 GBP