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Round|Natural|GIA

0.40ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 2507684551

Certificate GIA 2507684551

Diamond specifications and retailer prices

From $1,345 NZD
$758 USD
As of October 29, 2026
Save $1,386 NZD (51%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,652 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2507684551. Listed at 18 retailers as of October 29, 2026, with a 103% 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2507684551
Dimensions4.75 × 4.72 × 2.90 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Top View
4.75 mm4.72 mm0.40 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2507684551
Side View
Table 61.0%Crown 34.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $4,652 NZD|Low: $1,313 NZD|High: $4,652 NZD|Avg: $1,990 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 5$1,313 NZD
Retailer 10$1,320 NZD
Retailer 7$1,345 NZD
Retailer 9$1,345 NZD
Retailer 6$1,396 NZD
Retailer 8$1,551 NZD
Retailer 2$1,777 NZD
Retailer 3$1,934 NZD
Retailer 4$2,731 NZD
NZ Jewellers$4,652 NZD

41 data points across 10 retailers

18 retailers$1,345 NZD to $2,731 NZD

Retailer 1
-
$1,313 NZD
$740 USD
Price last confirmed 10 days ago
Retailer 2
-
$1,320 NZD
$744 USD
View
Price last confirmed 23 days ago
B+
Retailer 3
-
$1,345 NZD
$758 USD
View
B+
Retailer 4
-
$1,345 NZD
$758 USD
View
B+
Retailer 5
-
$1,356 NZD
$764 USD
View
B+
Retailer 6
-
$1,372 NZD
A$1,189 AUD
View
B+
Retailer 7
-
$1,396 NZD
$787 USD
View
B+
Retailer 8
-
$1,551 NZD
$874 USD
View
B
Retailer 9
-
$1,650 NZD
$930 USD
View
B
Retailer 10
-
$1,650 NZD
$930 USD
View
B
Retailer 11
-
$1,703 NZD
$960 USD
View
B
Retailer 12
-
$1,777 NZD
£789 GBP
View
B
Retailer 13
-
$1,895 NZD
$1,068 USD
View
B
Retailer 14
-
$1,934 NZD
€1,038 EUR
View
B
Retailer 15
-
$2,096 NZD
£930 GBP
View
B
Retailer 16
-
$2,388 NZD
CA$1,869 CAD
View
B
Retailer 17
-
$2,731 NZD
£1,212 GBP
View
Most Expensive
NZ Jewellers
3cc5280c-b09b-479f-ab98-90e441083a6f · Oct 30
$4,652 NZD
$2,622 USD
View
Price under review
17 more retailers have this diamond
Prices start from $1,345 NZDSave up to $1,386 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.

B+
0.40ct Round
$1,345 NZD