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Radiant|Natural|IGI

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • IGI 828653791

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

Certificate IGI 828653791

Diamond specifications and retailer prices

From $6,132 AUD
As of November 6, 2026
Save $6,305 AUD (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $12,436 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 828653791. Listed at 16 retailers as of November 5, 2026, with prices from $6,132 to $12,436, a $6,305 spread on the same certified stone. NZ Jewellers lists it at $12,436. 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
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle51.1°
Pavilion angle28.7°
OriginNatural
Grading LabIGI
CertificateIGI 828653791
Dimensions7.61 × 5.56 × 3.71 mm
L/W Ratio1.37
Culet sizeNone
Top View
7.61 mm5.56 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828653791
Side View
Table 67.0%Crown 51.1°Girdle: STK-THKPavilion 28.7°Culet: NoneDepth 66.7%

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: $12,436 AUD|Low: $6,132 AUD|High: $12,687 AUD|Avg: $7,828 AUD|-2.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 12$6,132 AUD
Retailer 2$6,229 AUD
Retailer 11$6,490 AUD
Retailer 6$6,538 AUD
Retailer 13$6,589 AUD
Retailer 9$7,031 AUD
Retailer 10$7,056 AUD
Retailer 7$7,083 AUD
Retailer 5$7,137 AUD
Retailer 14$7,249 AUD
Retailer 8$7,281 AUD
Retailer 15$7,475 AUD
Retailer 16$8,112 AUD
Retailer 3$8,709 AUD
Retailer 4$11,338 AUD
NZ Jewellers$12,436 AUD

15 data points across 16 retailers

16 retailers$6,132 AUD to $12,436 AUD

A
Cheapest Retailer
-
$6,132 AUD
A
Retailer 2
-
$6,229 AUD
View
A
Retailer 3
-
$6,490 AUD
View
Final sale: no returns
A
Retailer 4
-
$6,538 AUD
View
A
Retailer 5
-
$6,589 AUD
View
A
Retailer 6
-
$7,031 AUD
View
A
Retailer 7
-
$7,056 AUD
View
B+
Retailer 8
-
$7,083 AUD
View
A
Retailer 9
-
$7,137 AUD
View
A
Retailer 10
-
$7,249 AUD
View
Retailer 11
-
$7,281 AUD
View
Price last confirmed 9 days ago
A
Retailer 12
-
$7,475 AUD
View
B+
Retailer 13
-
$8,112 AUD
View
B+
Retailer 14
-
$8,709 AUD
View
B
Retailer 15
-
$11,338 AUD
View
Most Expensive
B
NZ Jewellers
f83d0672-7283-49fd-af05-b905100c3c1f · Nov 5
$12,436 AUD
$8,545 USD
View
15 more retailers have this diamond
Prices start from $6,132 AUDSave up to $6,305 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
$6,132 AUD