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Marquise|Lab Grown|IGI

1.00ct H VS1 Marquise Lab Grown Diamond

ID • H/VS1 • IGI LG514252420

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG514252420

Diamond specifications and retailer prices

From £535 GBP
As of November 4, 2026
Save £1,903 GBP (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,437 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown marquise diamond

This 1ct lab-grown marquise sits in the classic one-carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG514252420 or 514252420. Listed at 15 retailers as of November 1, 2026, with prices from £535 to £2,437, a £1,903 spread on the same certified stone. MOH London lists it at £2,437. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514252420
Dimensions10.27 × 5.16 × 2.92 mm
L/W Ratio1.99
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
10.27 mm5.16 mm1.00 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514252420
Side View
Table 61.5%Crown 39.3°Girdle: STK-THKPavilion 33°Culet: NoneDepth 56.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,437 GBP|Low: £513 GBP|High: £2,469 GBP|Avg: £1,248 GBP
MOH London
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
November 2, 2026
Retailer 12£535 GBP
Retailer 3£582 GBP
Retailer 4£599 GBP
Retailer 14£621 GBP
Retailer 13£711 GBP
Retailer 10£752 GBP
Retailer 7£975 GBP
Retailer 16£1,007 GBP
Retailer 2£1,140 GBP
Retailer 11£1,529 GBP
Retailer 9£1,617 GBP
Retailer 15£1,745 GBP
Retailer 8£1,777 GBP
Retailer 5£1,930 GBP
Retailer 6£1,943 GBP
MOH London£2,437 GBP

24 data points across 16 retailers

15 retailers£535 GBP to £2,437 GBP

B+
Cheapest Retailer
-
£535 GBP
B+
Retailer 2
-
£582 GBP
View
B+
Retailer 3
-
£599 GBP
View
Final sale: no returns
Retailer 4
-
£621 GBP
View
Price last confirmed 18 days ago
B+
Retailer 5
-
£621 GBP
View
B+
Retailer 6
-
£711 GBP
View
B+
Retailer 7
-
£752 GBP
View
B
Retailer 8
-
£1,007 GBP
View
B
Retailer 9
-
£1,140 GBP
View
B
Retailer 10
-
£1,529 GBP
View
B
Retailer 11
-
£1,617 GBP
View
B
Retailer 12
-
£1,745 GBP
View
B
Retailer 13
-
£1,930 GBP
View
B
Retailer 14
-
£1,943 GBP
View
Most Expensive
B
MOH London
LG514252420 · Nov 1
£2,437 GBP
View
14 more retailers have this diamond
Prices start from £535 GBPSave up to £1,903 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+
1.00ct Marquise
£535 GBP