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Round|Lab Grown|IGI

1.27ct H VS1 Round Lab Grown Diamond

VG • H/VS1 • IGI LG754510325

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754510325

Diamond specifications and retailer prices

From £123 GBP
As of November 3, 2026
Save £667 GBP (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £790 GBP at Flawless Fine Jewelry · As of November 4, 2026
View at Flawless Fine Jewelry

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 H colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG754510325 or 754510325. Listed at 16 retailers as of November 3, 2026, with prices from £123 to £790, a £667 spread on the same certified stone. Flawless Fine Jewelry lists it at £790. 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

1.27
Carat
H
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754510325
Dimensions6.89 × 6.86 × 4.23 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.89 mm6.86 mm1.27 ctH / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG754510325
Side View
Table 64.0%Crown 36.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.5%

Caratlytics Score

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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 3
Current: £790 GBP|Low: £123 GBP|High: £813 GBP|Avg: £417 GBP|-1.4%
Flawless Fine Jewelry
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
November 4, 2026
Retailer 11£123 GBP
Retailer 3£143 GBP
Retailer 12£153 GBP
Retailer 7£156 GBP
Retailer 10£263 GBP
Retailer 4£275 GBP
Retailer 9£286 GBP
Retailer 15£321 GBP
Retailer 16£339 GBP
Retailer 2£374 GBP
Retailer 13£490 GBP
Retailer 14£518 GBP
Retailer 5£530 GBP
Retailer 6£725 GBP
Retailer 8£756 GBP
Flawless Fine Jewelry£790 GBP

31 data points across 16 retailers

16 retailers£123 GBP to £790 GBP

A
Cheapest Retailer
-
£123 GBP
A
Retailer 2
-
£143 GBP
View
A
Retailer 3
-
£153 GBP
View
Retailer 4
-
£156 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£263 GBP
View
B+
Retailer 6
-
£275 GBP
View
B+
Retailer 7
-
£286 GBP
View
B+
Retailer 8
-
£321 GBP
View
A
Retailer 9
-
£339 GBP
View
B+
Retailer 10
-
£374 GBP
View
B+
Retailer 11
-
£490 GBP
View
B+
Retailer 12
-
£518 GBP
View
B+
Retailer 13
-
£530 GBP
View
Retailer 14
-
£725 GBP
View
Price last confirmed 7 days ago
B
Retailer 15
-
£756 GBP
View
Most Expensive
B
Flawless Fine Jewelry
BC029E9E8 · Nov 4
£790 GBP
View
15 more retailers have this diamond
Prices start from £123 GBPSave up to £667 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
£123 GBP