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Radiant|Natural|IGI

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • IGI 805628261

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 805628261

Diamond specifications and retailer prices

From $4,881 NZD
As of November 6, 2026
Save $5,278 NZD (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,160 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 805628261. Listed at 12 retailers as of November 5, 2026, with prices from $4,881 to $10,160, a $5,278 spread on the same certified stone. NZ Jewellers lists it at $10,160. 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle30.1°
OriginNatural
Grading LabIGI
CertificateIGI 805628261
Dimensions7.88 × 5.52 × 3.83 mm
L/W Ratio1.43
Top View
7.88 mm5.52 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 805628261
Side View
Table 69.0%Crown 37.2°Girdle: STK-THKPavilion 30.1°CuletDepth 69.4%

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 6
Current: $10,160 NZD|Low: $4,881 NZD|High: $10,160 NZD|Avg: $6,710 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$4,881 NZD
Retailer 2$5,610 NZD
Retailer 4$5,657 NZD
Retailer 8$5,832 NZD
Retailer 10$6,056 NZD
Retailer 6$6,729 NZD
Retailer 5$7,106 NZD
Retailer 7$7,118 NZD
Retailer 9$9,727 NZD
NZ Jewellers$10,160 NZD

40 data points across 10 retailers

12 retailers$4,881 NZD to $10,160 NZD

A
Cheapest Retailer
-
$4,881 NZD
B+
Retailer 2
-
$5,610 NZD
View
B+
Retailer 3
-
$5,657 NZD
View
B+
Retailer 4
-
$5,818 NZD
View
B+
Retailer 5
-
$5,832 NZD
View
B+
Retailer 6
-
$6,056 NZD
View
B+
Retailer 7
-
$6,090 NZD
View
B+
Retailer 8
-
$6,729 NZD
View
B+
Retailer 9
-
$7,106 NZD
View
B+
Retailer 10
-
$7,118 NZD
View
B
Retailer 11
-
$9,727 NZD
View
Most Expensive
B
NZ Jewellers
d03f0501-cf4a-4061-9fb1-4c34e4e16201 · Nov 5
$10,160 NZD
$5,632 USD
View
11 more retailers have this diamond
Prices start from $4,881 NZDSave up to $5,278 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
1.51ct Radiant
$4,881 NZD