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Round|Lab Grown|IGI

1.27ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG615372660

Shape and cutting style on the report: Round brilliant

Certificate IGI LG615372660

Diamond specifications and retailer prices

From £176 GBP
As of November 6, 2026
Save £607 GBP (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £783 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.27ct lab-grown round diamond

This 1.27ct 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 LG615372660 or 615372660. Listed at 17 retailers as of November 1, 2026, with prices from £176 to £783, a £607 spread on the same certified stone. MOH London lists it at £783. 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

1.27
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG615372660
Dimensions6.90 × 6.87 × 4.31 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
6.90 mm6.87 mm1.27 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG615372660
Side View
Table 57.0%Crown 34.9°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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 6
Current: £783 GBP|Low: £176 GBP|High: £793 GBP|Avg: £404 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£176 GBP
Retailer 8£195 GBP
Retailer 9£264 GBP
Retailer 7£311 GBP
Retailer 2£354 GBP
Retailer 3£357 GBP
Retailer 6£386 GBP
Retailer 5£630 GBP
Retailer 4£706 GBP
MOH London£783 GBP

42 data points across 10 retailers

17 retailers£176 GBP to £783 GBP

Retailer 1
-
£158 GBP
Price last confirmed 45 days ago
A
Retailer 2
-
£176 GBP
View
Final sale: no returns
Retailer 3
-
£183 GBP
View
Price last confirmed 45 days ago
Retailer 4
-
£193 GBP
View
Price last confirmed 42 days ago
B+
Retailer 5
-
£264 GBP
View
A
Retailer 6
-
£311 GBP
View
B+
Retailer 7
-
£354 GBP
View
B+
Retailer 8
-
£357 GBP
View
B+
Retailer 9
-
£386 GBP
View
B
Retailer 10
-
£511 GBP
View
Retailer 11
-
£628 GBP
View
Price last confirmed 46 days ago
B
Retailer 12
-
£630 GBP
View
B
Retailer 13
-
£635 GBP
View
B
Retailer 14
-
£667 GBP
View
B
Retailer 15
-
£691 GBP
View
B
Retailer 16
-
£706 GBP
View
Most Expensive
B
MOH London
LG615372660 · Nov 1
£783 GBP
View
16 more retailers have this diamond
Prices start from £176 GBPSave up to £607 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
1.27ct Round
£176 GBP