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Radiant|Natural|IGI

1.51ct K VS1 Radiant Natural Diamond

VG • K/VS1 • IGI 821621185

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

Certificate IGI 821621185

Diamond specifications and retailer prices

From $4,336 AUD
As of November 6, 2026
Save $4,695 AUD (52%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $9,031 AUD at NZ Jewellers · As of November 3, 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 VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI 821621185. Listed at 11 retailers as of November 3, 2026, with prices from $4,336 to $9,031, a $4,695 spread on the same certified stone. NZ Jewellers lists it at $9,031. 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
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.2°
Pavilion angle29.5°
OriginNatural
Grading LabIGI
CertificateIGI 821621185
Dimensions6.91 × 5.77 × 4.00 mm
L/W Ratio1.20
Top View
6.91 mm5.77 mm1.51 ctK / VS1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 821621185
Side View
Table 57.0%Crown 36.2°Girdle: STK-THKPavilion 29.5°CuletDepth 69.3%

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: $4,985 AUD|Low: $4,336 AUD|High: $8,772 AUD|Avg: $6,049 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 2$4,336 AUD
Retailer 3$4,857 AUD
Retailer 1$4,985 AUD
Retailer 7$5,384 AUD
Retailer 4$6,322 AUD
Retailer 5$6,327 AUD
Retailer 6$8,644 AUD

44 data points across 7 retailers

11 retailers$4,336 AUD to $9,031 AUD

A
Cheapest Retailer
-
$4,336 AUD
A
Retailer 2
-
$4,857 AUD
View
B+
Retailer 3
-
$4,985 AUD
View
B+
Retailer 4
-
$5,184 AUD
View
B+
Retailer 5
-
$5,384 AUD
View
B+
Retailer 6
-
$5,394 AUD
View
B+
Retailer 7
-
$5,980 AUD
View
B+
Retailer 8
-
$6,322 AUD
View
B+
Retailer 9
-
$6,327 AUD
View
B
Retailer 10
-
$8,644 AUD
View
Most Expensive
B
NZ Jewellers
ac3761aa-0dc6-4720-9af4-fb0f19618b43 · Nov 3
$9,031 AUD
$6,205 USD
View
10 more retailers have this diamond
Prices start from $4,336 AUDSave up to $4,695 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
$4,336 AUD