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Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 5566129731

Certificate GIA 5566129731

Diamond specifications and retailer prices

From $1,115 NZD
HK$4,900 HKD
As of November 1, 2026
Save $1,589 NZD (59%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $4,630 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 5566129731. Listed at 25 retailers as of November 1, 2026, with a 143% 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
SymmetryVery Good
FluorescenceFaint
Crown angle34.5°
Pavilion angle38.6°
OriginNatural
Grading LabGIA
CertificateGIA 5566129731
Dimensions6.44 × 4.59 × 2.78 mm
L/W Ratio1.40
Culet sizeNone
Key to symbols
Crystal
Top View
6.44 mm4.59 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5566129731
Side View
Table 64.0%Crown 34.5°Girdle: MED-THKPavilion 38.6°Culet: NoneDepth 60.5%

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: Nov 1
Current: $4,630 NZD|Low: $1,115 NZD|High: $4,630 NZD|Avg: $1,830 NZD
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
Retailer 21
Retailer 22
Retailer 23
November 2, 2026
Retailer 10$1,115 NZD
Retailer 2$1,118 NZD
Retailer 6$1,317 NZD
Retailer 3$1,351 NZD
Retailer 8$1,363 NZD
Retailer 11$1,415 NZD
Retailer 12$1,477 NZD
Retailer 22$1,477 NZD
Retailer 9$1,496 NZD
Retailer 23$1,534 NZD
Retailer 15$1,560 NZD
Retailer 4$1,704 NZD
Retailer 21$1,713 NZD
Retailer 17$1,763 NZD
Retailer 5$1,768 NZD
Retailer 13$1,812 NZD
Retailer 14$1,977 NZD
Retailer 7$2,056 NZD
Retailer 19$2,085 NZD
Retailer 16$2,114 NZD
Retailer 20$2,279 NZD
Retailer 18$2,704 NZD
NZ Jewellers$4,630 NZD

23 data points across 23 retailers

25 retailers$1,115 NZD to $2,704 NZD

A
Cheapest Retailer
-
$1,115 NZD
HK$4,900 HKD
A
Retailer 2
-
$1,118 NZD
₹59,902 INR
View
A
Retailer 3
-
$1,317 NZD
$741 USD
View
Retailer 4
-
$1,351 NZD
$760 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$1,363 NZD
$767 USD
View
Final sale: no returns
B+
Retailer 6
-
$1,388 NZD
A$1,202 AUD
View
A
Retailer 7
-
$1,415 NZD
SGD 1,076 SGD
View
B+
Retailer 8
-
$1,477 NZD
$831 USD
View
B+
Retailer 9
-
$1,477 NZD
$831 USD
View
B+
Retailer 10
-
$1,496 NZD
$842 USD
View
B+
Retailer 11
-
$1,534 NZD
$863 USD
View
B+
Retailer 12
-
$1,560 NZD
SGD 1,186 SGD
View
B+
Retailer 13
-
$1,704 NZD
$959 USD
View
B+
Retailer 14
-
$1,713 NZD
$964 USD
View
B+
Retailer 15
-
$1,763 NZD
£781 GBP
View
B
Retailer 16
-
$1,768 NZD
$995 USD
View
B+
Retailer 17
-
$1,812 NZD
£803 GBP
View
B+
Retailer 18
-
$1,977 NZD
$1,112 USD
View
B
Retailer 19
-
$2,056 NZD
$1,157 USD
View
B+
Retailer 20
-
$2,085 NZD
€1,117 EUR
View
B
Retailer 21
-
$2,114 NZD
$1,189 USD
View
B
Retailer 22
-
$2,279 NZD
ZAR 20,716 ZAR
View
Retailer 23
-
$2,303 NZD
A$1,993 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
$2,704 NZD
£1,198 GBP
View
Most Expensive
NZ Jewellers
4602bb7f-0c81-4db7-90e5-a0a5de6a7b7c · Oct 30
$4,630 NZD
$2,605 USD
View
Price under review
24 more retailers have this diamond
Prices start from $1,115 NZDSave up to $1,589 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.

A
0.51ct Oval
$1,115 NZD