Radiant|Natural|GIA

0.40ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 1553566105

Certificate GIA 1553566105

Diamond specifications and retailer prices

From $321 USD
As of October 30, 2026
Save $569 USD (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,470 USD 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 October 29, 2026, with a 177% 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
Color
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: Oct 30
Current: $1,470 USD|Low: $321 USD|High: $1,522 USD|Avg: $587 USD|-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
October 31, 2026
Retailer 3$321 USD
Retailer 8$321 USD
Retailer 13$347 USD
Retailer 6$371 USD
Retailer 5$374 USD
Retailer 4$387 USD
Retailer 14$459 USD
Retailer 12$462 USD
Retailer 11$468 USD
Retailer 2$500 USD
Retailer 7$624 USD
Retailer 9$778 USD
Retailer 10$890 USD
NZ Jewellers$1,470 USD

32 data points across 14 retailers

14 retailers$321 USD to $890 USD

A
Cheapest Retailer
-
$321 USD
A
Retailer 2
-
$321 USD
View
Final sale: no returns
A
Retailer 3
-
$347 USD
View
A
Retailer 4
-
$371 USD
HK$2,900 HKD
View
A
Retailer 5
-
$374 USD
View
A
Retailer 6
-
$387 USD
View
B+
Retailer 7
-
$459 USD
View
B+
Retailer 8
-
$462 USD
View
B+
Retailer 9
-
$468 USD
View
B+
Retailer 10
-
$500 USD
£394 GBP
View
B+
Retailer 11
-
$624 USD
€594 EUR
View
B
Retailer 12
-
$778 USD
£613 GBP
View
B
Retailer 13
-
$890 USD
£701 GBP
View
Most Expensive
NZ Jewellers
bb499261-4238-4c50-b80c-a9e86ae7201d · Oct 30
$1,470 USD
View
Price under review
13 more retailers have this diamond
Prices start from $321 USDSave up to $569 USD

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
$321 USD