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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 $456 NZD
As of November 5, 2026
Save $1,609 NZD (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,065 NZD 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 $456 to $2,065, a $1,609 spread on the same certified stone. NZ Jewellers lists it at $2,065. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $478 NZD|Low: $471 NZD|High: $1,064 NZD|Avg: $702 NZD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4$474 NZD
Retailer 1$478 NZD
Retailer 5$615 NZD
Retailer 8$684 NZD
Retailer 7$691 NZD
Retailer 3$787 NZD
Retailer 6$828 NZD
Retailer 2$1,050 NZD

22 data points across 8 retailers

10 retailers$456 NZD to $2,065 NZD

B+
Cheapest Retailer
-
$456 NZD
B+
Retailer 2
-
$478 NZD
View
Retailer 3
-
$491 NZD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$509 NZD
View
B+
Retailer 5
-
$613 NZD
View
B+
Retailer 6
-
$615 NZD
View
B+
Retailer 7
-
$691 NZD
View
B+
Retailer 8
-
$787 NZD
View
B+
Retailer 9
-
$1,050 NZD
View
Most Expensive
C
NZ Jewellers
57bb5c08-ad8c-44d9-9924-1c4132c678f2 · Nov 4
$2,065 NZD
$1,145 USD
View
9 more retailers have this diamond
Prices start from $456 NZDSave up to $1,609 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 Round
$456 NZD