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Round|Natural|IGI

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • IGI 660497001

Shape and cutting style on the report: Round brilliant

Certificate IGI 660497001

Diamond specifications and retailer prices

From $253 USD
As of November 5, 2026
Save $892 USD (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,145 USD at NZ Jewellers · As of November 4, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 660497001. Listed at 10 retailers as of November 4, 2026, with prices from $253 to $1,145, a $892 spread on the same certified stone. NZ Jewellers lists it at $1,145. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
K
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle34°
Pavilion angle40.1°
OriginNatural
Grading LabIGI
CertificateIGI 660497001
Dimensions5.07 × 5.05 × 3.12 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
5.07 mm5.05 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 660497001
Side View
Table 58.0%Crown 34°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 61.6%

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: Nov 5
Current: $265 USD|Low: $261 USD|High: $590 USD|Avg: $389 USD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4$263 USD
Retailer 1$265 USD
Retailer 5$341 USD
Retailer 8$379 USD
Retailer 7$383 USD
Retailer 3$436 USD
Retailer 6$459 USD
Retailer 2$582 USD

22 data points across 8 retailers

10 retailers$253 USD to $1,145 USD

B+
Cheapest Retailer
-
$253 USD
B+
Retailer 2
-
$265 USD
View
Retailer 3
-
$272 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$282 USD
View
B+
Retailer 5
-
$340 USD
View
B+
Retailer 6
-
$341 USD
View
B+
Retailer 7
-
$383 USD
View
B+
Retailer 8
-
$436 USD
View
B+
Retailer 9
-
$582 USD
View
Most Expensive
C
NZ Jewellers
57bb5c08-ad8c-44d9-9924-1c4132c678f2 · Nov 4
$1,145 USD
View
9 more retailers have this diamond
Prices start from $253 USDSave up to $892 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
$253 USD