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Round|Lab Grown|IGI

1.40ct H VS1 Round Lab Grown Diamond

EX • H/VS1 • IGI LG818686580

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686580

Diamond specifications and retailer prices

From £172 GBP
$229 USD
As of October 29, 2026
Save £684 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £856 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.4ct lab-grown round diamond

This 1.4ct 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 top-tier cut grade and certified by IGI LG818686580 or 818686580. Listed at 16 retailers as of October 28, 2026, with prices from £172 to £856, a £684 spread on the same certified stone. Brilliant Earth lists it at £856. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.40
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686580
Dimensions7.13 × 7.10 × 4.37 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.13 mm7.10 mm1.40 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686580
Side View
Table 60.0%Crown 36.1°Girdle: Slightly ThickPavilion 40.4°Culet: NoneDepth 61.4%

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: Oct 29
Current: £856 GBP|Low: £172 GBP|High: £924 GBP|Avg: £542 GBP|-7.3%
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
October 29, 2026
Retailer 11£172 GBP
Retailer 12£213 GBP
Retailer 13£362 GBP
Retailer 6£366 GBP
Retailer 2£386 GBP
Retailer 5£400 GBP
Retailer 9£469 GBP
Retailer 7£520 GBP
Retailer 10£559 GBP
Retailer 4£724 GBP
Retailer 3£782 GBP
Retailer 8£854 GBP
Brilliant Earth£856 GBP

30 data points across 13 retailers

16 retailers£172 GBP to £856 GBP

A
Cheapest Retailer
-
£172 GBP
$229 USD
A
Retailer 2
-
£199 GBP
$265 USD
View
A
Retailer 3
-
£213 GBP
$284 USD
View
A
Retailer 4
-
£213 GBP
$284 USD
View
A
Retailer 5
-
£362 GBP
$482 USD
View
A
Retailer 6
-
£366 GBP
ZAR 7,874 ZAR
View
A
Retailer 7
-
£386 GBP
€490 EUR
View
A
Retailer 8
-
£400 GBP
$533 USD
View
A
Retailer 9
-
£469 GBP
$625 USD
View
A
Retailer 10
-
£520 GBP
A$1,065 AUD
View
B+
Retailer 11
-
£559 GBP
$744 USD
View
B+
Retailer 12
-
£685 GBP
$912 USD
View
B+
Retailer 13
-
£724 GBP
$964 USD
View
B+
Retailer 14
-
£798 GBP
$1,063 USD
View
B+
Retailer 15
-
£854 GBP
View
Most Expensive
B+
Brilliant Earth
21297540A · Oct 28
£856 GBP
$1,140 USD
View
15 more retailers have this diamond
Prices start from £172 GBPSave up to £684 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
1.40ct Round
£172 GBP