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Oval|Natural|GIA

0.51ct I SI2 Oval Natural Diamond

EX • I/SI2 • GIA 5533910368

Certificate GIA 5533910368

Diamond specifications and retailer prices

From $1,238 NZD
$698 USD
As of October 29, 2026
Save $1,270 NZD (51%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,288 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 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 5533910368. Listed at 15 retailers as of October 26, 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.42°
Pavilion angle39.04°
OriginNatural
Grading LabGIA
CertificateGIA 5533910368
Dimensions6.48 × 4.44 × 2.69 mm
L/W Ratio1.46
Top View
6.48 mm4.44 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5533910368
Side View
Table 57.0%Crown 36.42°Girdle: STK-THKPavilion 39.04°Culet: NoneDepth 60.6%

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: $4,288 NZD|Low: $1,238 NZD|High: $4,288 NZD|Avg: $1,909 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6$1,238 NZD
Retailer 8$1,238 NZD
Retailer 5$1,286 NZD
Retailer 7$1,430 NZD
Retailer 10$1,572 NZD
Retailer 3$1,629 NZD
Retailer 2$1,774 NZD
Retailer 9$2,057 NZD
Retailer 4$2,508 NZD
NZ Jewellers$4,288 NZD

42 data points across 10 retailers

15 retailers$1,238 NZD to $2,508 NZD

B+
Cheapest Retailer
-
$1,238 NZD
$698 USD
B+
Retailer 2
-
$1,238 NZD
$698 USD
View
B+
Retailer 3
-
$1,265 NZD
$713 USD
View
B+
Retailer 4
-
$1,286 NZD
$725 USD
View
B
Retailer 5
-
$1,430 NZD
$806 USD
View
B+
Retailer 6
-
$1,524 NZD
$859 USD
View
B
Retailer 7
-
$1,561 NZD
$880 USD
View
B
Retailer 8
-
$1,561 NZD
$880 USD
View
B
Retailer 9
-
$1,572 NZD
$886 USD
View
B
Retailer 10
-
$1,615 NZD
$910 USD
View
B
Retailer 11
-
$1,629 NZD
£723 GBP
View
B
Retailer 12
-
$1,774 NZD
€952 EUR
View
B
Retailer 13
-
$2,508 NZD
£1,113 GBP
View
Retailer 14
-
$3,949 NZD
CA$3,091 CAD
View
Price under review
Most Expensive
NZ Jewellers
a946eeb6-7b30-43fe-9a47-f908a73a7f6c · Oct 30
$4,288 NZD
$2,417 USD
View
Price under review
14 more retailers have this diamond
Prices start from $1,238 NZDSave up to $1,270 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
$1,238 NZD