Radiant|Natural|GIA

0.40ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 1553566105

Certificate GIA 1553566105

Diamond specifications and retailer prices

From €287 EUR
$321 USD
As of October 31, 2026
Save €505 EUR (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €1,316 EUR 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 31, 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
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 31
Current: €1,316 EUR|Low: €287 EUR|High: €1,362 EUR|Avg: €552 EUR|-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 1, 2026
Retailer 3€287 EUR
Retailer 11€287 EUR
Retailer 13€311 EUR
Retailer 6€332 EUR
Retailer 5€335 EUR
Retailer 4€346 EUR
Retailer 9€407 EUR
Retailer 14€411 EUR
Retailer 12€419 EUR
Retailer 7€444 EUR
Retailer 10€558 EUR
Retailer 2€695 EUR
Retailer 8€792 EUR
NZ Jewellers€1,316 EUR

31 data points across 14 retailers

14 retailers€287 EUR to €792 EUR

A
Cheapest Retailer
-
€287 EUR
$321 USD
A
Retailer 2
-
€287 EUR
$321 USD
View
Final sale: no returns
A
Retailer 3
-
€311 EUR
$347 USD
View
A
Retailer 4
-
€332 EUR
HK$2,900 HKD
View
A
Retailer 5
-
€335 EUR
$374 USD
View
A
Retailer 6
-
€346 EUR
$387 USD
View
B+
Retailer 7
-
€407 EUR
$455 USD
View
B+
Retailer 8
-
€411 EUR
$459 USD
View
B+
Retailer 9
-
€419 EUR
$468 USD
View
B+
Retailer 10
-
€444 EUR
£390 GBP
View
B+
Retailer 11
-
€558 EUR
View
B
Retailer 12
-
€695 EUR
£611 GBP
View
B
Retailer 13
-
€792 EUR
£697 GBP
View
Most Expensive
NZ Jewellers
bb499261-4238-4c50-b80c-a9e86ae7201d · Oct 30
€1,316 EUR
$1,470 USD
View
Price under review
13 more retailers have this diamond
Prices start from €287 EURSave up to €505 EUR

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
€287 EUR