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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 $3,938 AUD
As of November 6, 2026
Save $4,259 AUD (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,197 AUD 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 $3,938 to $8,197, a $4,259 spread on the same certified stone. NZ Jewellers lists it at $8,197. 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: $8,197 AUD|Low: $3,938 AUD|High: $8,197 AUD|Avg: $5,413 AUD
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$3,938 AUD
Retailer 2$4,526 AUD
Retailer 4$4,564 AUD
Retailer 8$4,705 AUD
Retailer 10$4,886 AUD
Retailer 6$5,429 AUD
Retailer 5$5,733 AUD
Retailer 7$5,743 AUD
Retailer 9$7,848 AUD
NZ Jewellers$8,197 AUD

40 data points across 10 retailers

12 retailers$3,938 AUD to $8,197 AUD

A
Cheapest Retailer
-
$3,938 AUD
B+
Retailer 2
-
$4,526 AUD
View
B+
Retailer 3
-
$4,564 AUD
View
B+
Retailer 4
-
$4,694 AUD
View
B+
Retailer 5
-
$4,705 AUD
View
B+
Retailer 6
-
$4,886 AUD
View
B+
Retailer 7
-
$4,913 AUD
View
B+
Retailer 8
-
$5,429 AUD
View
B+
Retailer 9
-
$5,733 AUD
View
B+
Retailer 10
-
$5,743 AUD
View
B
Retailer 11
-
$7,848 AUD
View
Most Expensive
B
NZ Jewellers
d03f0501-cf4a-4061-9fb1-4c34e4e16201 · Nov 5
$8,197 AUD
$5,632 USD
View
11 more retailers have this diamond
Prices start from $3,938 AUDSave up to $4,259 AUD

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
$3,938 AUD