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Marquise|Lab Grown|IGI

0.51ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG440011400

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG440011400

Diamond specifications and retailer prices

From €272 EUR
$305 USD
As of November 2, 2026
Save €1,080 EUR (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,352 EUR at MOH London · As of November 1, 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 top-tier cut grade and certified by IGI LG440011400 or 440011400. Listed at 12 retailers as of November 1, 2026, with prices from €272 to €1,352, a €1,080 spread on the same certified stone. MOH London lists it at €1,352. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.3°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440011400
Dimensions7.93 × 4.24 × 2.60 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.93 mm4.24 mm0.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG440011400
Side View
Table 55.5%Crown 35.3°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 61.3%

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: €1,352 EUR|Low: €261 EUR|High: €1,368 EUR|Avg: €669 EUR
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 1, 2026
Retailer 11€272 EUR
Retailer 9€285 EUR
Retailer 3€305 EUR
Retailer 8€307 EUR
Retailer 15€316 EUR
Retailer 12€337 EUR
Retailer 16€337 EUR
Retailer 5€477 EUR
Retailer 14€550 EUR
Retailer 2€617 EUR
Retailer 6€663 EUR
Retailer 10€1,037 EUR
Retailer 13€1,084 EUR
Retailer 4€1,279 EUR
MOH London€1,352 EUR
Retailer 7€1,355 EUR

23 data points across 16 retailers

12 retailers€272 EUR to €1,352 EUR

A
Cheapest Retailer
-
€272 EUR
$305 USD
A
Retailer 2
-
€285 EUR
$320 USD
View
B+
Retailer 3
-
€305 EUR
$342 USD
View
Final sale: no returns
B+
Retailer 4
-
€316 EUR
$354 USD
View
Retailer 5
-
€337 EUR
$378 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
€337 EUR
$378 USD
View
B
Retailer 7
-
€550 EUR
$617 USD
View
B
Retailer 8
-
€617 EUR
View
B
Retailer 9
-
€1,037 EUR
$1,163 USD
View
B
Retailer 10
-
€1,084 EUR
$1,216 USD
View
B
Retailer 11
-
€1,279 EUR
$1,434 USD
View
Most Expensive
B
MOH London
LG440011400 · Nov 1
€1,352 EUR
£1,194 GBP
View
11 more retailers have this diamond
Prices start from €272 EURSave up to €1,080 EUR

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
€272 EUR