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Round|Lab Grown|IGI

1.30ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG490193858

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490193858

Diamond specifications and retailer prices

From £736 GBP
As of November 5, 2026
Save £1,103 GBP (60%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,886 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.3ct lab-grown round diamond

This 1.3ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG490193858 or 490193858. Listed at 13 retailers as of November 4, 2026, with a 150% 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

1.30
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490193858
Dimensions6.95 × 6.90 × 4.35 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
6.95 mm6.90 mm1.30 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490193858
Side View
Table 54.5%Crown 36.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,886 GBP|Low: £707 GBP|High: £2,929 GBP|Avg: £1,329 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5£736 GBP
Retailer 6£750 GBP
Retailer 9£824 GBP
Retailer 7£854 GBP
Retailer 10£854 GBP
Retailer 11£984 GBP
Retailer 2£1,299 GBP
Retailer 8£1,363 GBP
Retailer 4£1,839 GBP
Retailer 3£2,516 GBP
MOH London£2,886 GBP

41 data points across 11 retailers

13 retailers£736 GBP to £1,839 GBP

B
Cheapest Retailer
-
£736 GBP
B
Retailer 2
-
£750 GBP
View
B
Retailer 3
-
£800 GBP
View
B
Retailer 4
-
£824 GBP
View
Final sale: no returns
Retailer 5
-
£854 GBP
View
Price last confirmed 25 days ago
B
Retailer 6
-
£854 GBP
View
B
Retailer 7
-
£984 GBP
View
B
Retailer 8
-
£1,299 GBP
View
B
Retailer 9
-
£1,363 GBP
View
B
Retailer 10
-
£1,600 GBP
View
B
Retailer 11
-
£1,839 GBP
View
Retailer 12
-
£2,516 GBP
View
Price under review
Most Expensive
MOH London
LG490193858 · Nov 5
£2,886 GBP
View
Price under review
12 more retailers have this diamond
Prices start from £736 GBPSave up to £1,103 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
1.30ct Round
£736 GBP