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Round|Lab Grown|IGI

0.50ct E SI1 Round Lab Grown Diamond

VG • E/SI1 • IGI LG400929378

Shape and cutting style on the report: Round brilliant

Certificate IGI LG400929378

Diamond specifications and retailer prices

From £267 GBP
As of November 5, 2026
Save £715 GBP (73%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,310 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.5ct lab-grown round diamond

This 0.5ct lab-grown round sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG400929378 or 400929378. Listed at 12 retailers as of November 4, 2026, with a 268% 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

0.50
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG400929378
Dimensions5.01 × 4.97 × 3.21 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeMedium
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT) Type II
Top View
5.01 mm4.97 mm0.50 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG400929378
Side View
Table 55.5%Crown 36.5°Girdle: STK-THKPavilion 40.8°Culet: MediumDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,310 GBP|Low: £179 GBP|High: £1,325 GBP|Avg: £542 GBP
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
November 6, 2026
Retailer 5£179 GBP
Retailer 9£267 GBP
Retailer 8£270 GBP
Retailer 12£302 GBP
Retailer 4£314 GBP
Retailer 3£335 GBP
Retailer 10£335 GBP
Retailer 11£536 GBP
Retailer 2£593 GBP
Retailer 6£603 GBP
Retailer 7£983 GBP
Retailer 13£1,077 GBP
MOH London£1,310 GBP

43 data points across 13 retailers

12 retailers£267 GBP to £983 GBP

B+
Cheapest Retailer
-
£267 GBP
B+
Retailer 2
-
£270 GBP
View
B
Retailer 3
-
£302 GBP
View
Final sale: no returns
B
Retailer 4
-
£314 GBP
View
Retailer 5
-
£335 GBP
View
Price last confirmed 12 days ago
B
Retailer 6
-
£335 GBP
View
B
Retailer 7
-
£536 GBP
View
B
Retailer 8
-
£593 GBP
View
Retailer 9
-
£603 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£983 GBP
View
Retailer 11
-
£1,077 GBP
View
Price under review
Most Expensive
MOH London
LG400929378 · Nov 1
£1,310 GBP
View
Price under review
11 more retailers have this diamond
Prices start from £267 GBPSave up to £715 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+
0.50ct Round
£267 GBP