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Radiant|Lab Grown|IGI

1.51ct E FL Radiant Lab Grown Diamond

EX • E/FL • IGI LG815698215

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

Certificate IGI LG815698215

Diamond specifications and retailer prices

From $624 AUD
$438 USD
As of October 30, 2026
Save $4,117 AUD (87%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $5,623 AUD at Brilliant Earth · As of September 28, 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 LG815698215 or 815698215. Listed at 25 retailers as of October 30, 2026, with a 660% 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle24.4°
Pavilion angle34.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815698215
Dimensions8.03 × 5.95 × 3.68 mm
L/W Ratio1.35
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
8.03 mm5.95 mm1.51 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815698215
Side View
Table 68.0%Crown 24.4°Girdle: MediumPavilion 34.1°Culet: NoneDepth 61.8%

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: $4,741 AUD|Low: $624 AUD|High: $5,452 AUD|Avg: $2,113 AUD|-13.1%
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
October 31, 2026
Retailer 11$624 AUD
Retailer 22$699 AUD
Retailer 20$730 AUD
Retailer 10$773 AUD
Retailer 21$773 AUD
Retailer 19$975 AUD
Retailer 23$1,113 AUD
Retailer 4$1,217 AUD
Retailer 3$1,233 AUD
Retailer 2$1,278 AUD
Retailer 18$1,330 AUD
Retailer 6$1,515 AUD
Retailer 5$1,866 AUD
Retailer 7$2,256 AUD
Retailer 9$2,487 AUD
Retailer 8$2,535 AUD
Retailer 16$2,707 AUD
Retailer 14$2,795 AUD
Retailer 17$2,858 AUD
Retailer 13$2,975 AUD
Retailer 15$4,022 AUD
Brilliant Earth$4,741 AUD
Retailer 12$4,869 AUD

25 data points across 23 retailers

25 retailers$624 AUD to $4,741 AUD

A
Cheapest Retailer
-
$624 AUD
$438 USD
A
Retailer 2
-
$699 AUD
$491 USD
View
A
Retailer 3
-
$730 AUD
$513 USD
View
Final sale: no returns
A
Retailer 4
-
$773 AUD
$543 USD
View
A
Retailer 5
-
$773 AUD
$543 USD
View
A
Retailer 6
-
$975 AUD
$685 USD
View
A
Retailer 7
-
$1,113 AUD
$782 USD
View
A
Retailer 8
-
$1,217 AUD
$855 USD
View
Retailer 9
-
$1,233 AUD
€825 EUR
View
Price last confirmed 7 days ago
A
Retailer 10
-
$1,278 AUD
£707 GBP
View
A
Retailer 11
-
$1,330 AUD
ZAR 15,088 ZAR
View
A
Retailer 12
-
$1,515 AUD
$1,064 USD
View
B+
Retailer 13
-
$1,866 AUD
$1,311 USD
View
B+
Retailer 14
-
$2,256 AUD
£1,248 GBP
View
B+
Retailer 15
-
$2,487 AUD
$1,747 USD
View
B+
Retailer 16
-
$2,535 AUD
$1,781 USD
View
B+
Retailer 17
-
$2,691 AUD
$1,890 USD
View
B+
Retailer 18
-
$2,707 AUD
SGD 2,570 SGD
View
B
Retailer 19
-
$2,795 AUD
$1,963 USD
View
B
Retailer 20
-
$2,858 AUD
£1,581 GBP
View
B+
Retailer 21
-
$2,975 AUD
$2,090 USD
View
B
Retailer 22
-
$4,022 AUD
$2,825 USD
View
B
Retailer 23
-
$4,741 AUD
$3,330 USD
View
Retailer 24
-
$4,869 AUD
$3,420 USD
View
Price last confirmed 12 days ago
Most Expensive
Brilliant Earth
20988172A · Sep 28
$5,623 AUD
$3,950 USD
View
Price last confirmed 32 days ago
24 more retailers have this diamond
Prices start from $624 AUDSave up to $4,117 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
$624 AUD