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Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG605337352

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

Certificate IGI LG605337352

Diamond specifications and retailer prices

From $515 NZD
$290 USD
As of October 30, 2026
Save $4,223 NZD (89%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $4,737 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 LG605337352 or 605337352. Listed at 24 retailers as of October 30, 2026, with prices from $515 to $4,737, a $4,223 spread on the same certified stone. Brilliant Earth lists it at $4,737. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.9°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605337352
Dimensions8.05 × 5.77 × 3.84 mm
L/W Ratio1.40
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
8.05 mm5.77 mm1.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605337352
Side View
Table 67.0%Crown 46.9°Girdle: MediumPavilion 36.3°Culet: NoneDepth 66.6%

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: $4,737 NZD|Low: $490 NZD|High: $5,394 NZD|Avg: $1,778 NZD|-9.8%
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
November 1, 2026
Retailer 6$515 NZD
Retailer 3$596 NZD
Retailer 2$605 NZD
Retailer 9$639 NZD
Retailer 14$639 NZD
Retailer 22$914 NZD
Retailer 11$1,049 NZD
Retailer 21$1,096 NZD
Retailer 8$1,100 NZD
Retailer 16$1,129 NZD
Retailer 17$1,181 NZD
Retailer 20$1,484 NZD
Retailer 10$1,714 NZD
Retailer 5$1,796 NZD
Retailer 7$2,051 NZD
Retailer 15$2,138 NZD
Retailer 18$2,454 NZD
Retailer 19$2,537 NZD
Retailer 13$2,558 NZD
Retailer 12$2,627 NZD
Retailer 4$4,045 NZD
Brilliant Earth$4,737 NZD

35 data points across 22 retailers

24 retailers$515 NZD to $4,737 NZD

A
Cheapest Retailer
-
$515 NZD
$290 USD
A
Retailer 2
-
$596 NZD
$336 USD
View
A
Retailer 3
-
$605 NZD
$341 USD
View
Final sale: no returns
Retailer 4
-
$639 NZD
$360 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$639 NZD
$360 USD
View
A
Retailer 6
-
$914 NZD
$515 USD
View
A
Retailer 7
-
$1,049 NZD
$591 USD
View
A
Retailer 8
-
$1,096 NZD
ZAR 9,982 ZAR
View
A
Retailer 9
-
$1,100 NZD
$620 USD
View
A
Retailer 10
-
$1,129 NZD
£501 GBP
View
A
Retailer 11
-
$1,181 NZD
€634 EUR
View
A
Retailer 12
-
$1,484 NZD
A$1,287 AUD
View
A
Retailer 13
-
$1,714 NZD
$966 USD
View
B+
Retailer 14
-
$1,796 NZD
$1,012 USD
View
B+
Retailer 15
-
$2,051 NZD
$1,156 USD
View
B+
Retailer 16
-
$2,101 NZD
$1,184 USD
View
B+
Retailer 17
-
$2,138 NZD
$1,205 USD
View
B+
Retailer 18
-
$2,346 NZD
$1,322 USD
View
B+
Retailer 19
-
$2,454 NZD
$1,383 USD
View
B+
Retailer 20
-
$2,530 NZD
£1,123 GBP
View
B+
Retailer 21
-
$2,537 NZD
A$2,200 AUD
View
B+
Retailer 22
-
$2,558 NZD
£1,135 GBP
View
B+
Retailer 23
-
$2,627 NZD
$1,481 USD
View
Most Expensive
B
Brilliant Earth
14717190A · Oct 31
$4,737 NZD
$2,670 USD
View
23 more retailers have this diamond
Prices start from $515 NZDSave up to $4,223 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