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Round|Lab Grown|IGI

1.30ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG771638784

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771638784

Diamond specifications and retailer prices

From £314 GBP
As of November 6, 2026
Save £523 GBP (63%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £837 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 very-good cut grade and certified by IGI LG771638784 or 771638784. Listed at 5 retailers as of November 5, 2026, with prices from £314 to £837, a £523 spread on the same certified stone. MOH London lists it at £837. 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

1.30
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771638784
Dimensions7.14 × 7.07 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.14 mm7.07 mm1.30 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG771638784
Side View
Table 64.0%Crown 33.6°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 58.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £837 GBP|Low: £295 GBP|High: £849 GBP|Avg: £425 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£314 GBP
Retailer 5£318 GBP
Retailer 2£323 GBP
Retailer 3£412 GBP
MOH London£837 GBP

41 data points across 5 retailers

5 retailers£314 GBP to £837 GBP

B+
Cheapest Retailer
-
£314 GBP
B+
Retailer 2
-
£318 GBP
View
B+
Retailer 3
-
£323 GBP
View
B+
Retailer 4
-
£412 GBP
View
Most Expensive
B
MOH London
LG771638784 · Nov 5
£837 GBP
View
4 more retailers have this diamond
Prices start from £314 GBPSave up to £523 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
£314 GBP