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Round|Lab Grown|IGI

1.03ct G SI1 Round Lab Grown Diamond

GD • G/SI1 • IGI LG846647387

Shape and cutting style on the report: Round brilliant

Certificate IGI LG846647387

Diamond specifications and retailer prices

From £190 GBP
$255 USD
As of November 1, 2026
Save £470 GBP (71%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £661 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG846647387 or 846647387. Listed at 9 retailers as of October 26, 2026, with prices from £190 to £661, a £470 spread on the same certified stone. MOH London lists it at £661. 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

1.03
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846647387
Dimensions6.32 × 6.26 × 4.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.32 mm6.26 mm1.03 ctG / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG846647387
Side View
Table 60.0%Crown 38.6°Girdle: STK-VTKPavilion 40.8°Culet: NoneDepth 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 1
Current: £661 GBP|Low: £190 GBP|High: £661 GBP|Avg: £345 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9£190 GBP
Retailer 4£241 GBP
Retailer 7£244 GBP
Retailer 6£244 GBP
Retailer 5£299 GBP
Retailer 2£310 GBP
Retailer 3£355 GBP
Retailer 8£379 GBP
MOH London£661 GBP

8 data points across 9 retailers

9 retailers£190 GBP to £661 GBP

B
Cheapest Retailer
-
£190 GBP
$255 USD
B+
Retailer 2
-
£241 GBP
$323 USD
View
B+
Retailer 3
-
£244 GBP
View
B+
Retailer 4
-
£244 GBP
€312 EUR
View
B+
Retailer 5
-
£299 GBP
$400 USD
View
B
Retailer 6
-
£310 GBP
$415 USD
View
B
Retailer 7
-
£355 GBP
$475 USD
View
B
Retailer 8
-
£379 GBP
$508 USD
View
Most Expensive
C
MOH London
LG846647387 · Oct 26
£661 GBP
View
8 more retailers have this diamond
Prices start from £190 GBPSave up to £470 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+
1.03ct Round
£190 GBP