Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG593386843

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

Certificate IGI LG593386843

Diamond specifications and retailer prices

From $344 USD
As of October 30, 2026
Save $3,136 USD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,480 USD at Brilliant Earth · As of October 8, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG593386843 or 593386843. Listed at 23 retailers as of October 30, 2026, with a 912% 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
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.4°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG593386843
Dimensions7.83 × 5.74 × 3.92 mm
L/W Ratio1.36
Culet sizePointed
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
7.83 mm5.74 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG593386843
Side View
Table 62.0%Crown 42.4°Girdle: MediumPavilion 36°Culet: NoneDepth 68.3%

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: $3,480 USD|Low: $330 USD|High: $3,480 USD|Avg: $1,036 USD
Brilliant Earth
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
Retailer 15
Retailer 16
October 31, 2026
Retailer 3$344 USD
Retailer 7$385 USD
Retailer 4$426 USD
Retailer 11$440 USD
Retailer 10$572 USD
Retailer 15$580 USD
Retailer 14$733 USD
Retailer 2$751 USD
Retailer 9$766 USD
Retailer 13$990 USD
Retailer 16$1,028 USD
Retailer 6$1,371 USD
Retailer 5$1,611 USD
Retailer 8$1,653 USD
Retailer 12$1,675 USD
Brilliant Earth$3,480 USD

32 data points across 16 retailers

23 retailers$344 USD to $3,480 USD

A
Cheapest Retailer
-
$344 USD
A
Retailer 2
-
$385 USD
View
Final sale: no returns
A
Retailer 3
-
$399 USD
View
A
Retailer 4
-
$426 USD
View
A
Retailer 5
-
$426 USD
View
A
Retailer 6
-
$440 USD
£347 GBP
View
A
Retailer 7
-
$572 USD
View
A
Retailer 8
-
$580 USD
View
A
Retailer 9
-
$682 USD
View
A
Retailer 10
-
$733 USD
ZAR 11,839 ZAR
View
A
Retailer 11
-
$751 USD
€715 EUR
View
A
Retailer 12
-
$766 USD
£603 GBP
View
A
Retailer 13
-
$990 USD
A$1,523 AUD
View
B+
Retailer 14
-
$1,028 USD
View
B+
Retailer 15
-
$1,031 USD
View
B+
Retailer 16
-
$1,371 USD
View
B+
Retailer 17
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$1,381 USD
£1,088 GBP
View
B+
Retailer 18
-
$1,413 USD
View
B+
Retailer 19
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$1,611 USD
View
B+
Retailer 20
-
$1,653 USD
View
B+
Retailer 21
-
$1,675 USD
£1,319 GBP
View
B
Retailer 22
-
$3,480 USD
View
Most Expensive
Brilliant Earth
21385297A · Oct 8
$3,480 USD
View
Price last confirmed 23 days ago
22 more retailers have this diamond
Prices start from $344 USDSave up to $3,136 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
$344 USD