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Marquise|Lab Grown|IGI

0.51ct I SI1 Marquise Lab Grown Diamond

VG • I/SI1 • IGI LG414082005

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG414082005

Diamond specifications and retailer prices

From €244 EUR
$274 USD
As of November 2, 2026
Save €977 EUR (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,222 EUR 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG414082005 or 414082005. Listed at 11 retailers as of October 29, 2026, with prices from €244 to €1,222, a €977 spread on the same certified stone. MOH London lists it at €1,222. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle33.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG414082005
Dimensions8.50 × 4.28 × 2.54 mm
L/W Ratio1.99
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
8.50 mm4.28 mm0.51 ctI / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG414082005
Side View
Table 57.5%Crown 33.1°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 59.3%

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: €1,222 EUR|Low: €234 EUR|High: €1,231 EUR|Avg: €591 EUR|+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
Retailer 13
Retailer 14
October 30, 2026
Retailer 9€244 EUR
Retailer 3€274 EUR
Retailer 13€284 EUR
Retailer 2€285 EUR
Retailer 10€303 EUR
Retailer 14€303 EUR
Retailer 4€446 EUR
Retailer 12€503 EUR
Retailer 7€564 EUR
Retailer 5€618 EUR
Retailer 8€932 EUR
Retailer 11€975 EUR
Retailer 6€1,219 EUR
MOH London€1,222 EUR

22 data points across 14 retailers

11 retailers€244 EUR to €1,222 EUR

A
Cheapest Retailer
-
€244 EUR
$274 USD
B+
Retailer 2
-
€274 EUR
$307 USD
View
Final sale: no returns
B+
Retailer 3
-
€284 EUR
$318 USD
View
B+
Retailer 4
-
€285 EUR
$320 USD
View
Retailer 5
-
€303 EUR
$340 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
€303 EUR
$340 USD
View
B
Retailer 7
-
€503 EUR
$564 USD
View
Retailer 8
-
€564 EUR
View
Price last confirmed 8 days ago
B
Retailer 9
-
€932 EUR
$1,045 USD
View
C
Retailer 10
-
€975 EUR
$1,094 USD
View
Most Expensive
B
MOH London
LG414082005 · Oct 29
€1,222 EUR
£1,079 GBP
View
10 more retailers have this diamond
Prices start from €244 EURSave up to €977 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
€244 EUR