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0.55ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055359

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055359

Diamond specifications and retailer prices

From £219 GBP
$294 USD
As of October 29, 2026
Save £876 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,096 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.55ct lab-grown round diamond

This 0.55ct lab-grown round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055359 or 451055359. Listed at 11 retailers as of October 29, 2026, with prices from £219 to £1,096, a £876 spread on the same certified stone. MOH London lists it at £1,096. 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

0.55
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055359
Dimensions5.18 × 5.21 × 3.28 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
5.18 mm5.21 mm0.55 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451055359
Side View
Table 59.0%Crown 35.7°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.0%

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: £1,096 GBP|Low: £210 GBP|High: £1,102 GBP|Avg: £467 GBP|-0.5%
MOH London
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 29, 2026
Retailer 7£219 GBP
Retailer 12£246 GBP
Retailer 3£254 GBP
Retailer 8£269 GBP
Retailer 9£272 GBP
Retailer 11£272 GBP
Retailer 4£388 GBP
Retailer 10£446 GBP
Retailer 2£504 GBP
Retailer 5£543 GBP
Retailer 6£835 GBP
Retailer 13£874 GBP
MOH London£1,096 GBP

20 data points across 13 retailers

11 retailers£219 GBP to £1,096 GBP

A
Cheapest Retailer
-
£219 GBP
$294 USD
A
Retailer 2
-
£246 GBP
$329 USD
View
Final sale: no returns
A
Retailer 3
-
£254 GBP
$341 USD
View
B+
Retailer 4
-
£269 GBP
$360 USD
View
B+
Retailer 5
-
£272 GBP
$364 USD
View
B+
Retailer 6
-
£272 GBP
$364 USD
View
B+
Retailer 7
-
£446 GBP
$597 USD
View
B+
Retailer 8
-
£504 GBP
€643 EUR
View
B
Retailer 9
-
£835 GBP
$1,119 USD
View
B
Retailer 10
-
£874 GBP
$1,171 USD
View
Most Expensive
B
MOH London
LG451055359 · Oct 29
£1,096 GBP
View
10 more retailers have this diamond
Prices start from £219 GBPSave up to £876 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
0.55ct Round
£219 GBP