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 $870 USD
HK$6,800 HKD
As of October 30, 2026
Save $2,419 USD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,289 USD 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 October 26, 2026, with prices from $870 to $3,289, a $2,419 spread on the same certified stone. MOH London lists it at $3,289. 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
Color
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: Oct 30
Current: $3,289 USD|Low: $866 USD|High: $3,325 USD|Avg: $2,010 USD|-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
October 30, 2026
Retailer 7$870 USD
Retailer 10$1,070 USD
Retailer 11$1,123 USD
Retailer 6$1,156 USD
Retailer 5$1,185 USD
Retailer 3$1,794 USD
Retailer 8$2,395 USD
Retailer 4$2,446 USD
Retailer 9$2,452 USD
Retailer 2$2,570 USD
Retailer 12$2,649 USD
MOH London$3,289 USD

31 data points across 12 retailers

13 retailers$870 USD to $3,289 USD

A
Cheapest Retailer
-
$870 USD
HK$6,800 HKD
A
Retailer 2
-
$1,070 USD
View
A
Retailer 3
-
$1,123 USD
View
A
Retailer 4
-
$1,156 USD
€1,101 EUR
View
A
Retailer 5
-
$1,185 USD
£933 GBP
View
A
Retailer 6
-
$1,430 USD
View
B+
Retailer 7
-
$1,794 USD
View
B+
Retailer 8
-
$2,395 USD
View
B+
Retailer 9
-
$2,446 USD
View
Retailer 10
-
$2,452 USD
A$3,773 AUD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
$2,570 USD
View
B
Retailer 12
-
$2,649 USD
View
Most Expensive
B
MOH London
LG818684380 · Oct 26
$3,289 USD
£2,590 GBP
View
12 more retailers have this diamond
Prices start from $870 USDSave up to $2,419 USD

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
$870 USD