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0.51ct N SI2 Round Natural Diamond

EX • N/SI2 • IGI 171549685

Shape and cutting style on the report: Round brilliant

Certificate IGI 171549685

Diamond specifications and retailer prices

From $256 USD
As of October 31, 2026
Save $905 USD (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,161 USD at NZ Jewellers · As of November 2, 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 N colour (tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 171549685. Listed at 8 retailers as of October 31, 2026, with prices from $256 to $1,161, a $905 spread on the same certified stone. NZ Jewellers lists it at $1,161. 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
N
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.8°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 171549685
Dimensions5.10 × 5.13 × 3.17 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
5.10 mm5.13 mm0.51 ctN / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 171549685
Side View
Table 57.0%Crown 34.8°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.0%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $434 USD|Low: $337 USD|High: $436 USD|Avg: $385 USD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 3, 2026
Retailer 4$337 USD
Retailer 3$384 USD
Retailer 2$386 USD
Retailer 1$434 USD

12 data points across 4 retailers

8 retailers$256 USD to $1,161 USD

B+
Cheapest Retailer
-
$256 USD
Retailer 2
-
$276 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$286 USD
View
Retailer 4
-
$337 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
$345 USD
View
B+
Retailer 6
-
$386 USD
View
B
Retailer 7
-
$434 USD
View
Most Expensive
C
NZ Jewellers
c8903fd2-e836-4673-a49f-d24ddcc6514f · Nov 2
$1,161 USD
View
7 more retailers have this diamond
Prices start from $256 USDSave up to $905 USD

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 Round
$256 USD