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Marquise|Lab Grown|IGI

1.51ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG818684380

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818684380

Diamond specifications and retailer prices

From €776 EUR
HK$6,800 HKD
As of November 1, 2026
Save €1,586 EUR (67%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €2,933 EUR at MOH London · As of October 26, 2026
View at MOH London

About this 1.51ct lab-grown marquise diamond

This 1.51ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818684380 or 818684380. Listed at 13 retailers as of November 1, 2026, with a 204% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818684380
Dimensions11.84 × 6.08 × 3.65 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.84 mm6.08 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818684380
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 60.0%

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 1
Current: €2,933 EUR|Low: €772 EUR|High: €2,964 EUR|Avg: €1,784 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7€776 EUR
Retailer 10€954 EUR
Retailer 11€1,001 EUR
Retailer 6€1,031 EUR
Retailer 2€1,047 EUR
Retailer 3€1,599 EUR
Retailer 8€2,135 EUR
Retailer 4€2,180 EUR
Retailer 9€2,187 EUR
Retailer 5€2,291 EUR
Retailer 12€2,362 EUR
MOH London€2,933 EUR

34 data points across 12 retailers

13 retailers€776 EUR to €2,362 EUR

A
Cheapest Retailer
-
€776 EUR
HK$6,800 HKD
A
Retailer 2
-
€954 EUR
$1,070 USD
View
A
Retailer 3
-
€1,001 EUR
$1,123 USD
View
A
Retailer 4
-
€1,031 EUR
View
A
Retailer 5
-
€1,047 EUR
£925 GBP
View
A
Retailer 6
-
€1,275 EUR
$1,430 USD
View
Retailer 7
-
€1,599 EUR
$1,794 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
€2,135 EUR
$2,395 USD
View
B+
Retailer 9
-
€2,180 EUR
$2,446 USD
View
Retailer 10
-
€2,187 EUR
A$3,773 AUD
View
Price last confirmed 25 days ago
B+
Retailer 11
-
€2,291 EUR
$2,570 USD
View
B
Retailer 12
-
€2,362 EUR
$2,649 USD
View
Most Expensive
MOH London
LG818684380 · Oct 26
€2,933 EUR
£2,590 GBP
View
Price last confirmed 7 days ago
12 more retailers have this diamond
Prices start from €776 EURSave up to €1,586 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
1.51ct Marquise
€776 EUR