Radiant|Natural|GIA

0.40ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 1553566105

Certificate GIA 1553566105

Diamond specifications and retailer prices

From $570 NZD
$321 USD
As of November 1, 2026
Save $1,001 NZD (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,608 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural radiant diamond

This 0.4ct natural radiant sits in the sub-half-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553566105. Listed at 14 retailers as of November 1, 2026, with a 176% 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

0.40
Carat
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.8°
Pavilion angle60.56°
OriginNatural
Grading LabGIA
CertificateGIA 1553566105
Dimensions5.07 × 3.74 × 2.53 mm
L/W Ratio1.36
Girdle conditionPolished
Top View
5.07 mm3.74 mm0.40 ctI / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1553566105
Side View
Table 65.0%Crown 35.8°Girdle: THN-MEDPavilion 60.56°Culet: NDepth 67.6%

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: Nov 1
Current: $2,608 NZD|Low: $570 NZD|High: $2,700 NZD|Avg: $1,109 NZD|-3.4%
NZ Jewellers
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
November 2, 2026
Retailer 3$570 NZD
Retailer 11$570 NZD
Retailer 13$616 NZD
Retailer 6$659 NZD
Retailer 5$664 NZD
Retailer 4$687 NZD
Retailer 10$807 NZD
Retailer 14$814 NZD
Retailer 12$830 NZD
Retailer 8$887 NZD
Retailer 7$1,108 NZD
Retailer 2$1,377 NZD
Retailer 9$1,571 NZD
NZ Jewellers$2,608 NZD

31 data points across 14 retailers

14 retailers$570 NZD to $1,571 NZD

A
Cheapest Retailer
-
$570 NZD
$321 USD
A
Retailer 2
-
$570 NZD
$321 USD
View
Final sale: no returns
A
Retailer 3
-
$616 NZD
$347 USD
View
A
Retailer 4
-
$659 NZD
HK$2,900 HKD
View
A
Retailer 5
-
$664 NZD
$374 USD
View
A
Retailer 6
-
$687 NZD
$387 USD
View
B+
Retailer 7
-
$807 NZD
$455 USD
View
B+
Retailer 8
-
$814 NZD
$459 USD
View
B+
Retailer 9
-
$830 NZD
$468 USD
View
B+
Retailer 10
-
$887 NZD
£394 GBP
View
B+
Retailer 11
-
$1,108 NZD
€595 EUR
View
B
Retailer 12
-
$1,377 NZD
£611 GBP
View
B
Retailer 13
-
$1,571 NZD
£697 GBP
View
Most Expensive
NZ Jewellers
bb499261-4238-4c50-b80c-a9e86ae7201d · Oct 30
$2,608 NZD
$1,470 USD
View
Price under review
13 more retailers have this diamond
Prices start from $570 NZDSave up to $1,001 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
0.40ct Radiant
$570 NZD