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Round|Lab Grown|IGI

1.54ct H VS1 Round Lab Grown Diamond

EX • H/VS1 • IGI LG778657770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778657770

Diamond specifications and retailer prices

From £154 GBP
As of November 3, 2026
Save £658 GBP (81%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £813 GBP at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.54ct lab-grown round diamond

This 1.54ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG778657770 or 778657770. Listed at 21 retailers as of November 3, 2026, with prices from £154 to £813, a £658 spread on the same certified stone. Brilliant Earth lists it at £813. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.54
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778657770
Dimensions7.44 × 7.39 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.44 mm7.39 mm1.54 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778657770
Side View
Table 62.0%Crown 34.9°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 60.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £813 GBP|Low: £151 GBP|High: £1,141 GBP|Avg: £481 GBP|-28.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 6£154 GBP
Retailer 18£172 GBP
Retailer 17£179 GBP
Retailer 14£192 GBP
Retailer 8£192 GBP
Retailer 12£330 GBP
Retailer 3£331 GBP
Retailer 9£344 GBP
Retailer 16£439 GBP
Retailer 11£446 GBP
Retailer 2£508 GBP
Retailer 7£570 GBP
Retailer 15£615 GBP
Retailer 10£623 GBP
Retailer 5£655 GBP
Retailer 13£767 GBP
Retailer 4£774 GBP
Brilliant Earth£813 GBP

34 data points across 18 retailers

21 retailers£154 GBP to £813 GBP

A
Cheapest Retailer
-
£154 GBP
Retailer 2
-
£157 GBP
View
Price last confirmed 47 days ago
A
Retailer 3
-
£172 GBP
View
Final sale: no returns
A
Retailer 4
-
£179 GBP
View
Retailer 5
-
£191 GBP
View
Price last confirmed 46 days ago
A
Retailer 6
-
£192 GBP
View
Retailer 7
-
£192 GBP
View
Price last confirmed 10 days ago
A
Retailer 8
-
£330 GBP
View
B+
Retailer 9
-
£331 GBP
View
A
Retailer 10
-
£344 GBP
View
A
Retailer 11
-
£439 GBP
View
A
Retailer 12
-
£446 GBP
View
B+
Retailer 13
-
£508 GBP
View
B+
Retailer 14
-
£570 GBP
View
B+
Retailer 15
-
£615 GBP
View
Retailer 16
-
£623 GBP
View
Price last confirmed 44 days ago
B+
Retailer 17
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£623 GBP
View
B+
Retailer 18
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£655 GBP
View
B+
Retailer 19
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£767 GBP
View
B+
Retailer 20
-
£774 GBP
View
Most Expensive
B+
Brilliant Earth
21501128A · Nov 3
£813 GBP
$1,090 USD
View
20 more retailers have this diamond
Prices start from £154 GBPSave up to £658 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
1.54ct Round
£154 GBP