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Round|Lab Grown|IGI

1.30ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG488154720

Shape and cutting style on the report: Round brilliant

Certificate IGI LG488154720

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)
12 retailers carry this diamond
Most expensive: £2,894 GBP at MOH London · As of November 3, 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 LG488154720 or 488154720. Listed at 12 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG488154720
Dimensions7.00 × 7.02 × 4.33 mm
L/W Ratio1.00
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
7.00 mm7.02 mm1.30 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG488154720
Side View
Table 55.0%Crown 35.3°Girdle: MediumPavilion 40.2°Culet: NoneDepth 61.8%

Caratlytics Score

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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: £2,894 GBP|Low: £736 GBP|High: £2,933 GBP|Avg: £1,287 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4£736 GBP
Retailer 5£750 GBP
Retailer 8£824 GBP
Retailer 6£854 GBP
Retailer 9£984 GBP
Retailer 2£1,299 GBP
Retailer 7£1,363 GBP
Retailer 3£1,839 GBP
MOH London£2,894 GBP

43 data points across 9 retailers

12 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
Most Expensive
MOH London
LG488154720 · Nov 3
£2,894 GBP
View
Price under review
11 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