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Marquise|Lab Grown|IGI

0.51ct H SI1 Marquise Lab Grown Diamond

VG • H/SI1 • IGI LG436072213

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436072213

Diamond specifications and retailer prices

From £228 GBP
$305 USD
As of November 2, 2026
Save £910 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,137 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG436072213 or 436072213. Listed at 10 retailers as of October 29, 2026, with prices from £228 to £1,137, a £910 spread on the same certified stone. MOH London lists it at £1,137. 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

0.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle31.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072213
Dimensions8.40 × 4.28 × 2.55 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizePointed
Top View
8.40 mm4.28 mm0.51 ctH / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436072213
Side View
Table 63.0%Crown 31.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 59.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,137 GBP|Low: £219 GBP|High: £1,145 GBP|Avg: £516 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 7£228 GBP
Retailer 2£254 GBP
Retailer 11£264 GBP
Retailer 8£282 GBP
Retailer 12£282 GBP
Retailer 3£399 GBP
Retailer 10£460 GBP
Retailer 5£516 GBP
Retailer 4£555 GBP
Retailer 6£868 GBP
Retailer 9£908 GBP
MOH London£1,137 GBP

22 data points across 12 retailers

10 retailers£228 GBP to £1,137 GBP

A
Cheapest Retailer
-
£228 GBP
$305 USD
B+
Retailer 2
-
£254 GBP
$340 USD
View
B+
Retailer 3
-
£264 GBP
$354 USD
View
Retailer 4
-
£282 GBP
$378 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£282 GBP
$378 USD
View
B
Retailer 6
-
£460 GBP
$617 USD
View
Retailer 7
-
£516 GBP
€659 EUR
View
Price last confirmed 8 days ago
B
Retailer 8
-
£868 GBP
$1,163 USD
View
B
Retailer 9
-
£908 GBP
$1,216 USD
View
Most Expensive
B
MOH London
LG436072213 · Oct 29
£1,137 GBP
View
9 more retailers have this diamond
Prices start from £228 GBPSave up to £910 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
0.51ct Marquise
£228 GBP