Marquise|Lab Grown|IGI

1.51ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG812620850

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG812620850

Diamond specifications and retailer prices

From $675 USD
As of October 30, 2026
Save $2,586 USD (79%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,261 USD at MOH London · As of October 29, 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 LG812620850 or 812620850. Listed at 23 retailers as of October 29, 2026, with prices from $675 to $3,261, a $2,586 spread on the same certified stone. MOH London lists it at $3,261. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812620850
Dimensions11.80 × 6.03 × 3.64 mm
L/W Ratio1.96
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
11.80 mm6.03 mm1.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812620850
Side View
Table 61.0%Crown 34.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,261 USD|Low: $590 USD|High: $3,349 USD|Avg: $1,693 USD|+6.0%
MOH London
Retailer 2
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Retailer 20
October 31, 2026
Retailer 8$615 USD
Retailer 3$675 USD
Retailer 9$762 USD
Retailer 10$762 USD
Retailer 2$855 USD
Retailer 17$1,052 USD
Retailer 19$1,120 USD
Retailer 5$1,157 USD
Retailer 15$1,169 USD
Retailer 16$1,284 USD
Retailer 13$1,603 USD
Retailer 14$1,741 USD
Retailer 12$1,800 USD
Retailer 11$2,225 USD
Retailer 20$2,268 USD
Retailer 4$2,416 USD
Retailer 7$2,425 USD
Retailer 18$2,478 USD
Retailer 6$3,130 USD
MOH London$3,261 USD

37 data points across 20 retailers

23 retailers$675 USD to $3,261 USD

Retailer 1
-
$615 USD
Price last confirmed 23 days ago
A
Retailer 2
-
$675 USD
View
Final sale: no returns
Retailer 3
-
$688 USD
View
Price last confirmed 32 days ago
Retailer 4
-
$720 USD
View
Price last confirmed 36 days ago
Retailer 5
-
$762 USD
View
Price last confirmed 28 days ago
Retailer 6
-
$762 USD
View
Price last confirmed 19 days ago
A
Retailer 7
-
$855 USD
View
A
Retailer 8
-
$1,052 USD
View
A
Retailer 9
-
$1,120 USD
View
A
Retailer 10
-
$1,157 USD
€1,102 EUR
View
A
Retailer 11
-
$1,169 USD
£921 GBP
View
A
Retailer 12
-
$1,284 USD
ZAR 20,748 ZAR
View
A
Retailer 13
-
$1,603 USD
View
B+
Retailer 14
-
$1,741 USD
A$2,678 AUD
View
Retailer 15
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$1,800 USD
View
Price last confirmed 7 days ago
Retailer 16
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$2,005 USD
View
Price last confirmed 30 days ago
Retailer 17
-
$2,225 USD
£1,752 GBP
View
Price last confirmed 20 days ago
B+
Retailer 18
-
$2,268 USD
View
B+
Retailer 19
-
$2,416 USD
View
B+
Retailer 20
-
$2,425 USD
View
B+
Retailer 21
-
$2,478 USD
View
Retailer 22
-
$3,130 USD
View
Price last confirmed 8 days ago
Most Expensive
B
MOH London
LG812620850 · Oct 29
$3,261 USD
£2,568 GBP
View
22 more retailers have this diamond
Prices start from $675 USDSave up to $2,586 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
$675 USD