Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG654418105

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

Certificate IGI LG654418105

Diamond specifications and retailer prices

From $743 NZD
$419 USD
As of October 30, 2026
Save $2,706 NZD (78%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $4,143 NZD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 LG654418105 or 654418105. Listed at 25 retailers as of October 30, 2026, with a 364% 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 angle40.5°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654418105
Dimensions8.05 × 5.68 × 3.83 mm
L/W Ratio1.42
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 mm5.68 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654418105
Side View
Table 66.0%Crown 40.5°Girdle: MediumPavilion 33.9°Culet: NoneDepth 67.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $4,143 NZD|Low: $713 NZD|High: $4,205 NZD|Avg: $1,953 NZD|-1.5%
Rare Carat
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
November 1, 2026
Retailer 19$743 NZD
Retailer 6$832 NZD
Retailer 10$832 NZD
Retailer 4$921 NZD
Retailer 7$921 NZD
Retailer 17$1,180 NZD
Retailer 2$1,295 NZD
Retailer 9$1,348 NZD
Retailer 12$1,518 NZD
Retailer 13$1,531 NZD
Retailer 16$1,584 NZD
Retailer 14$2,146 NZD
Retailer 18$2,585 NZD
Retailer 11$2,677 NZD
Retailer 8$2,931 NZD
Retailer 5$2,963 NZD
Retailer 3$3,375 NZD
Retailer 15$3,403 NZD
Rare Carat$4,143 NZD

44 data points across 19 retailers

25 retailers$743 NZD to $3,449 NZD

A
Cheapest Retailer
-
$743 NZD
$419 USD
A
Retailer 2
-
$832 NZD
$469 USD
View
Final sale: no returns
A
Retailer 3
-
$832 NZD
$469 USD
View
Retailer 4
-
$921 NZD
$519 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$921 NZD
$519 USD
View
A
Retailer 6
-
$1,022 NZD
HK$4,500 HKD
View
A
Retailer 7
-
$1,180 NZD
$665 USD
View
A
Retailer 8
-
$1,295 NZD
$730 USD
View
A
Retailer 9
-
$1,348 NZD
$760 USD
View
A
Retailer 10
-
$1,518 NZD
£674 GBP
View
A
Retailer 11
-
$1,531 NZD
€822 EUR
View
A
Retailer 12
-
$1,584 NZD
ZAR 14,419 ZAR
View
B+
Retailer 13
-
$1,877 NZD
$1,058 USD
View
B+
Retailer 14
-
$2,146 NZD
A$1,861 AUD
View
B+
Retailer 15
-
$2,390 NZD
£1,061 GBP
View
B+
Retailer 16
-
$2,585 NZD
$1,457 USD
View
B+
Retailer 17
-
$2,677 NZD
£1,188 GBP
View
B+
Retailer 18
-
$2,931 NZD
SGD 2,232 SGD
View
B+
Retailer 19
-
$2,963 NZD
$1,670 USD
View
B
Retailer 20
-
$3,022 NZD
$1,703 USD
View
B
Retailer 21
-
$3,357 NZD
$1,892 USD
View
B
Retailer 22
-
$3,375 NZD
$1,902 USD
View
B+
Retailer 23
-
$3,403 NZD
£1,510 GBP
View
B
Retailer 24
-
$3,449 NZD
$1,944 USD
View
Most Expensive
Rare Carat
197B56-7A · Oct 18
$4,143 NZD
$2,335 USD
View
Price last confirmed 14 days ago
24 more retailers have this diamond
Prices start from $743 NZDSave up to $2,706 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
$743 NZD