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Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1493017308

Certificate GIA 1493017308

Diamond specifications and retailer prices

From $1,505 NZD
$848 USD
As of October 31, 2026
Save $1,797 NZD (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,395 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1493017308. Listed at 20 retailers as of October 31, 2026, with a 119% 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

0.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1493017308
Dimensions6.36 × 4.56 × 2.86 mm
L/W Ratio1.39
Culet sizeNone
Key to symbols
Crystal
Top View
6.36 mm4.56 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1493017308
Side View
Table 62.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.8%

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 31
Current: $4,395 NZD|Low: $1,505 NZD|High: $4,462 NZD|Avg: $2,179 NZD|-1.5%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 1, 2026
Retailer 9$1,505 NZD
Retailer 16$1,508 NZD
Retailer 8$1,602 NZD
Retailer 5$1,632 NZD
Retailer 11$1,632 NZD
Retailer 6$1,652 NZD
Retailer 17$1,696 NZD
Retailer 7$1,810 NZD
Retailer 4$1,884 NZD
Retailer 18$1,907 NZD
Retailer 3$1,987 NZD
Retailer 19$1,987 NZD
Retailer 20$2,058 NZD
Retailer 13$2,113 NZD
Retailer 10$2,376 NZD
Retailer 14$2,400 NZD
Retailer 12$2,428 NZD
Retailer 15$2,782 NZD
Retailer 2$3,301 NZD
NZ Jewellers$4,395 NZD

39 data points across 20 retailers

20 retailers$1,505 NZD to $3,301 NZD

B+
Cheapest Retailer
-
$1,505 NZD
$848 USD
Final sale: no returns
Retailer 2
-
$1,508 NZD
$850 USD
View
Price last confirmed 11 days ago
B+
Retailer 3
-
$1,602 NZD
$903 USD
View
B+
Retailer 4
-
$1,632 NZD
$920 USD
View
B+
Retailer 5
-
$1,632 NZD
$920 USD
View
B+
Retailer 6
-
$1,652 NZD
$931 USD
View
B+
Retailer 7
-
$1,696 NZD
$956 USD
View
B+
Retailer 8
-
$1,810 NZD
$1,020 USD
View
B+
Retailer 9
-
$1,884 NZD
$1,062 USD
View
B+
Retailer 10
-
$1,907 NZD
$1,075 USD
View
B+
Retailer 11
-
$1,987 NZD
$1,120 USD
View
B+
Retailer 12
-
$1,987 NZD
$1,120 USD
View
B+
Retailer 13
-
$2,058 NZD
$1,160 USD
View
B+
Retailer 14
-
$2,113 NZD
£938 GBP
View
B
Retailer 15
-
$2,376 NZD
$1,339 USD
View
B
Retailer 16
-
$2,400 NZD
€1,288 EUR
View
Retailer 17
-
$2,428 NZD
A$2,105 AUD
View
Price last confirmed 27 days ago
B
Retailer 18
-
$2,782 NZD
ZAR 25,330 ZAR
View
B
Retailer 19
-
$3,301 NZD
£1,465 GBP
View
Most Expensive
NZ Jewellers
3360d27d-0a55-485c-bf6c-69e6653dbffb · Oct 30
$4,395 NZD
$2,477 USD
View
Price under review
19 more retailers have this diamond
Prices start from $1,505 NZDSave up to $1,797 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+
0.51ct Oval
$1,505 NZD