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Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG771614878

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

Certificate IGI LG771614878

Diamond specifications and retailer prices

From $413 AUD
$290 USD
As of November 2, 2026
Save $3,175 AUD (88%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $3,587 AUD at Brilliant Earth · As of October 31, 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 LG771614878 or 771614878. Listed at 26 retailers as of October 31, 2026, with prices from $413 to $3,587, a $3,175 spread on the same certified stone. Brilliant Earth lists it at $3,587. 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 angle42.8°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771614878
Dimensions8.08 × 5.57 × 3.86 mm
L/W Ratio1.45
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
8.08 mm5.57 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771614878
Side View
Table 65.0%Crown 42.8°Girdle: Slightly ThickPavilion 34°Culet: NoneDepth 69.3%

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: $3,587 AUD|Low: $413 AUD|High: $4,954 AUD|Avg: $1,477 AUD|-27.6%
Brilliant Earth
Retailer 2
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Retailer 25
November 2, 2026
Retailer 7$413 AUD
Retailer 8$460 AUD
Retailer 25$478 AUD
Retailer 14$511 AUD
Retailer 24$511 AUD
Retailer 2$527 AUD
Retailer 17$565 AUD
Retailer 23$733 AUD
Retailer 20$834 AUD
Retailer 12$841 AUD
Retailer 6$881 AUD
Retailer 19$882 AUD
Retailer 13$905 AUD
Retailer 22$1,189 AUD
Retailer 3$1,441 AUD
Retailer 5$1,572 AUD
Retailer 18$1,639 AUD
Retailer 4$1,644 AUD
Retailer 11$1,714 AUD
Retailer 16$1,967 AUD
Retailer 10$1,996 AUD
Retailer 21$2,061 AUD
Retailer 15$2,107 AUD
Retailer 9$3,239 AUD
Brilliant Earth$3,587 AUD

33 data points across 25 retailers

26 retailers$413 AUD to $3,587 AUD

A
Cheapest Retailer
-
$413 AUD
$290 USD
A
Retailer 2
-
$460 AUD
$323 USD
View
Final sale: no returns
A
Retailer 3
-
$478 AUD
$336 USD
View
Retailer 4
-
$511 AUD
$359 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$511 AUD
$359 USD
View
A
Retailer 6
-
$527 AUD
£291 GBP
View
A
Retailer 7
-
$565 AUD
HK$3,100 HKD
View
A
Retailer 8
-
$733 AUD
$515 USD
View
A
Retailer 9
-
$834 AUD
€558 EUR
View
A
Retailer 10
-
$841 AUD
$591 USD
View
A
Retailer 11
-
$881 AUD
$619 USD
View
A
Retailer 12
-
$882 AUD
ZAR 10,010 ZAR
View
A
Retailer 13
-
$905 AUD
£501 GBP
View
A
Retailer 14
-
$1,189 AUD
View
B+
Retailer 15
-
$1,441 AUD
$1,012 USD
View
Retailer 16
-
$1,572 AUD
$1,104 USD
View
Price last confirmed 7 days ago
B+
Retailer 17
-
$1,639 AUD
SGD 1,556 SGD
View
B+
Retailer 18
-
$1,644 AUD
$1,155 USD
View
B+
Retailer 19
-
$1,714 AUD
$1,204 USD
View
B+
Retailer 20
-
$1,834 AUD
$1,288 USD
View
B+
Retailer 21
-
$1,967 AUD
$1,382 USD
View
B+
Retailer 22
-
$1,996 AUD
£1,104 GBP
View
B+
Retailer 23
-
$2,061 AUD
£1,140 GBP
View
B+
Retailer 24
-
$2,107 AUD
$1,480 USD
View
Retailer 25
-
$3,239 AUD
$2,275 USD
View
Price last confirmed 14 days ago
Most Expensive
B
Brilliant Earth
19064245A · Oct 31
$3,587 AUD
$2,520 USD
View
25 more retailers have this diamond
Prices start from $413 AUDSave up to $3,175 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
$413 AUD