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Round|Lab Grown|IGI

1.03ct K SI2 Round Lab Grown Diamond

ID • K/SI2 • IGI LG499105200

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499105200

Diamond specifications and retailer prices

From £575 GBP
As of November 5, 2026
Save £1,301 GBP (69%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,515 GBP at MOH London · As of October 29, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499105200 or 499105200. Listed at 9 retailers as of November 5, 2026, with a 226% 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

1.03
Carat
K
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499105200
Dimensions6.47 × 6.51 × 3.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.47 mm6.51 mm1.03 ctK / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499105200
Side View
Table 59.0%Crown 35.6°GirdlePavilion 40.6°Culet: NoneDepth 61.2%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £2,515 GBP|Low: £552 GBP|High: £2,532 GBP|Avg: £1,246 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 4£575 GBP
Retailer 5£667 GBP
Retailer 7£667 GBP
Retailer 8£1,034 GBP
Retailer 6£1,078 GBP
Retailer 2£1,152 GBP
Retailer 9£1,493 GBP
Retailer 3£1,587 GBP
MOH London£2,515 GBP

17 data points across 9 retailers

9 retailers£575 GBP to £1,876 GBP

A
Cheapest Retailer
-
£575 GBP
B+
Retailer 2
-
£626 GBP
View
Retailer 3
-
£667 GBP
View
Price last confirmed 25 days ago
B+
Retailer 4
-
£667 GBP
View
B
Retailer 5
-
£1,078 GBP
View
Retailer 6
-
£1,152 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£1,587 GBP
View
B
Retailer 8
-
£1,876 GBP
View
Most Expensive
MOH London
LG499105200 · Oct 29
£2,515 GBP
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from £575 GBPSave up to £1,301 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
1.03ct Round
£575 GBP