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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 $515 NZD
$290 USD
As of October 30, 2026
Save $3,957 NZD (88%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $4,471 NZD 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 30, 2026, with prices from $515 to $4,471, a $3,957 spread on the same certified stone. Brilliant Earth lists it at $4,471. 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

How it works →
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: $4,471 NZD|Low: $515 NZD|High: $6,175 NZD|Avg: $1,877 NZD|-27.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 11
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Retailer 21
Retailer 22
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Retailer 24
Retailer 25
November 1, 2026
Retailer 7$515 NZD
Retailer 8$573 NZD
Retailer 25$596 NZD
Retailer 14$637 NZD
Retailer 24$637 NZD
Retailer 2$656 NZD
Retailer 17$704 NZD
Retailer 23$914 NZD
Retailer 13$1,040 NZD
Retailer 12$1,049 NZD
Retailer 22$1,096 NZD
Retailer 6$1,098 NZD
Retailer 19$1,128 NZD
Retailer 21$1,482 NZD
Retailer 3$1,796 NZD
Retailer 5$1,959 NZD
Retailer 18$2,043 NZD
Retailer 4$2,049 NZD
Retailer 11$2,136 NZD
Retailer 16$2,452 NZD
Retailer 10$2,488 NZD
Retailer 20$2,569 NZD
Retailer 15$2,626 NZD
Retailer 9$4,037 NZD
Brilliant Earth$4,471 NZD

33 data points across 25 retailers

26 retailers$515 NZD to $4,471 NZD

A
Cheapest Retailer
-
$515 NZD
$290 USD
A
Retailer 2
-
$573 NZD
$323 USD
View
Final sale: no returns
A
Retailer 3
-
$596 NZD
$336 USD
View
Retailer 4
-
$637 NZD
$359 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$637 NZD
$359 USD
View
A
Retailer 6
-
$656 NZD
£291 GBP
View
A
Retailer 7
-
$704 NZD
HK$3,100 HKD
View
A
Retailer 8
-
$914 NZD
$515 USD
View
A
Retailer 9
-
$1,040 NZD
€558 EUR
View
A
Retailer 10
-
$1,049 NZD
$591 USD
View
A
Retailer 11
-
$1,096 NZD
ZAR 9,975 ZAR
View
A
Retailer 12
-
$1,098 NZD
$619 USD
View
A
Retailer 13
-
$1,128 NZD
£500 GBP
View
A
Retailer 14
-
$1,482 NZD
A$1,285 AUD
View
B+
Retailer 15
-
$1,796 NZD
$1,012 USD
View
B+
Retailer 16
-
$1,959 NZD
$1,104 USD
View
B+
Retailer 17
-
$2,043 NZD
SGD 1,556 SGD
View
B+
Retailer 18
-
$2,049 NZD
$1,155 USD
View
B+
Retailer 19
-
$2,136 NZD
$1,204 USD
View
B+
Retailer 20
-
$2,285 NZD
$1,288 USD
View
B+
Retailer 21
-
$2,452 NZD
$1,382 USD
View
B+
Retailer 22
-
$2,488 NZD
£1,104 GBP
View
B+
Retailer 23
-
$2,569 NZD
£1,140 GBP
View
B+
Retailer 24
-
$2,626 NZD
$1,480 USD
View
Retailer 25
-
$4,037 NZD
$2,275 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
19064245A · Oct 31
$4,471 NZD
$2,520 USD
View
25 more retailers have this diamond
Prices start from $515 NZDSave up to $3,957 NZD

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
$515 NZD