Radiant|Lab Grown|IGI

1.51ct E FL Radiant Lab Grown Diamond

EX • E/FL • IGI LG800679081

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG800679081

Diamond specifications and retailer prices

From $653 USD
HK$5,100 HKD
As of October 30, 2026
Save $3,167 USD (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,820 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800679081 or 800679081. Listed at 10 retailers as of October 29, 2026, with prices from $653 to $3,820, a $3,167 spread on the same certified stone. Brilliant Earth lists it at $3,820. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800679081
Dimensions8.12 × 5.86 × 3.72 mm
L/W Ratio1.39
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
8.12 mm5.86 mm1.51 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800679081
Side View
Table 59.0%Crown 45.7°Girdle: Slightly ThickPavilion 33.4°Culet: NoneDepth 63.5%

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: $3,820 USD|Low: $653 USD|High: $3,950 USD|Avg: $1,808 USD|-3.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 5$653 USD
Retailer 9$805 USD
Retailer 4$874 USD
Retailer 2$943 USD
Retailer 8$1,072 USD
Retailer 7$1,329 USD
Retailer 6$1,862 USD
Retailer 10$1,963 USD
Retailer 3$2,094 USD
Brilliant Earth$3,820 USD

42 data points across 10 retailers

10 retailers$653 USD to $3,820 USD

A
Cheapest Retailer
-
$653 USD
HK$5,100 HKD
A
Retailer 2
-
$805 USD
View
A
Retailer 3
-
$874 USD
€832 EUR
View
A
Retailer 4
-
$943 USD
£743 GBP
View
B+
Retailer 5
-
$1,072 USD
View
B+
Retailer 6
-
$1,329 USD
View
B
Retailer 7
-
$1,862 USD
View
B
Retailer 8
-
$1,963 USD
View
B
Retailer 9
-
$2,094 USD
£1,649 GBP
View
Most Expensive
B
Brilliant Earth
20788319A · Oct 29
$3,820 USD
View
9 more retailers have this diamond
Prices start from $653 USDSave up to $3,167 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 Radiant
$653 USD