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Round|Natural|IGI

0.51ct L SI2 Round Natural Diamond

EX • L/SI2 • IGI 649450535

Shape and cutting style on the report: Round brilliant

Certificate IGI 649450535

Diamond specifications and retailer prices

From $422 NZD
As of November 5, 2026
Save $411 NZD (49%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,024 NZD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 649450535. Listed at 10 retailers as of November 5, 2026, with a 97% 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
L
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 649450535
Dimensions5.14 × 5.15 × 3.16 mm
L/W Ratio1.00
Culet sizeNone
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
5.14 mm5.15 mm0.51 ctL / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI 649450535
Side View
Table 55.0%Crown 33.6°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $833 NZD|Low: $279 NZD|High: $877 NZD|Avg: $594 NZD|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 6$279 NZD
Retailer 3$422 NZD
Retailer 4$464 NZD
Retailer 2$471 NZD
Retailer 5$822 NZD
Retailer 1$833 NZD

20 data points across 6 retailers

10 retailers$422 NZD to $833 NZD

A
Cheapest Retailer
-
$422 NZD
Retailer 2
-
$447 NZD
View
Price last confirmed 12 days ago
A
Retailer 3
-
$471 NZD
View
Retailer 4
-
$480 NZD
View
Price last confirmed 8 days ago
Retailer 5
-
$480 NZD
View
Price last confirmed 11 days ago
Retailer 6
-
$498 NZD
View
Price last confirmed 12 days ago
Retailer 7
-
$601 NZD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
$822 NZD
View
B+
Retailer 9
-
$833 NZD
View
Most Expensive
NZ Jewellers
67278ce5-6cbe-454b-8eb5-abee5df2899c · Oct 27
$2,024 NZD
$1,138 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from $422 NZDSave up to $411 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 Round
$422 NZD