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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 $490 AUD
$344 USD
As of November 2, 2026
Save $4,464 AUD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,954 AUD 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 31, 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
Colour
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: Nov 2
Current: $4,954 AUD|Low: $470 AUD|High: $4,954 AUD|Avg: $1,510 AUD
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
November 2, 2026
Retailer 3$490 AUD
Retailer 4$606 AUD
Retailer 7$625 AUD
Retailer 11$814 AUD
Retailer 13$826 AUD
Retailer 8$1,047 AUD
Retailer 2$1,067 AUD
Retailer 9$1,090 AUD
Retailer 12$1,409 AUD
Retailer 14$1,463 AUD
Retailer 6$1,952 AUD
Retailer 5$2,293 AUD
Retailer 10$2,372 AUD
Brilliant Earth$4,954 AUD

33 data points across 14 retailers

23 retailers$490 AUD to $4,954 AUD

A
Cheapest Retailer
-
$490 AUD
$344 USD
A
Retailer 2
-
$548 AUD
$385 USD
View
Final sale: no returns
A
Retailer 3
-
$568 AUD
$399 USD
View
Retailer 4
-
$606 AUD
$426 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$606 AUD
$426 USD
View
A
Retailer 6
-
$625 AUD
£346 GBP
View
A
Retailer 7
-
$814 AUD
$572 USD
View
A
Retailer 8
-
$826 AUD
$580 USD
View
A
Retailer 9
-
$971 AUD
$682 USD
View
A
Retailer 10
-
$1,047 AUD
ZAR 11,881 ZAR
View
A
Retailer 11
-
$1,067 AUD
€714 EUR
View
A
Retailer 12
-
$1,090 AUD
£603 GBP
View
A
Retailer 13
-
$1,409 AUD
View
B+
Retailer 14
-
$1,463 AUD
$1,028 USD
View
B+
Retailer 15
-
$1,468 AUD
$1,031 USD
View
B+
Retailer 16
-
$1,952 AUD
$1,371 USD
View
B+
Retailer 17
-
$1,967 AUD
£1,088 GBP
View
B+
Retailer 18
-
$2,012 AUD
$1,413 USD
View
B+
Retailer 19
-
$2,293 AUD
$1,611 USD
View
B+
Retailer 20
-
$2,353 AUD
$1,653 USD
View
B+
Retailer 21
-
$2,372 AUD
£1,312 GBP
View
B
Retailer 22
-
$4,954 AUD
$3,480 USD
View
Most Expensive
Brilliant Earth
21385297A · Oct 8
$4,954 AUD
$3,480 USD
View
Price last confirmed 24 days ago
22 more retailers have this diamond
Prices start from $490 AUDSave up to $4,464 AUD

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
$490 AUD