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Radiant|Lab Grown|IGI

1.51ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG825630053

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

Certificate IGI LG825630053

Diamond specifications and retailer prices

From $503 NZD
As of November 6, 2026
Save $1,102 NZD (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,021 NZD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG825630053 or 825630053. Listed at 12 retailers as of November 5, 2026, with a 219% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle45.6°
Pavilion angle30.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825630053
Dimensions7.45 × 6.17 × 3.70 mm
L/W Ratio1.21
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.45 mm6.17 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG825630053
Side View
Table 71.0%Crown 45.6°Girdle: MED-STKPavilion 30.8°Culet: NoneDepth 60.0%

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 6
Current: $503 NZD|Low: $323 NZD|High: $3,085 NZD|Avg: $1,193 NZD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 6, 2026
Retailer 2$355 NZD
Retailer 1$503 NZD
Retailer 11$666 NZD
Retailer 4$685 NZD
Retailer 9$705 NZD
Retailer 12$705 NZD
Retailer 7$824 NZD
Retailer 6$974 NZD
Retailer 5$1,308 NZD
Retailer 3$1,369 NZD
Retailer 8$1,605 NZD
Retailer 10$1,853 NZD
Reve Diamonds$2,021 NZD

38 data points across 13 retailers

12 retailers$503 NZD to $1,605 NZD

A
Cheapest Retailer
-
$503 NZD
A
Retailer 2
-
$666 NZD
View
Retailer 3
-
$685 NZD
View
Price last confirmed 15 days ago
Retailer 4
-
$705 NZD
View
Price last confirmed 13 days ago
Retailer 5
-
$705 NZD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$824 NZD
View
B+
Retailer 7
-
$974 NZD
View
B+
Retailer 8
-
$1,308 NZD
View
Retailer 9
-
$1,369 NZD
View
Price last confirmed 11 days ago
B
Retailer 10
-
$1,605 NZD
View
Retailer 11
-
$1,853 NZD
View
Price last confirmed 13 days ago
Most Expensive
Reve Diamonds
9925E2399 · Oct 25
$2,021 NZD
$1,120 USD
View
Price last confirmed 12 days ago
11 more retailers have this diamond
Prices start from $503 NZDSave up to $1,102 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
$503 NZD