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Radiant|Natural|IGI

1.57ct I SI1 Radiant Natural Diamond

VG • I/SI1 • IGI 770664057

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

Certificate IGI 770664057

Diamond specifications and retailer prices

From $3,969 AUD
As of November 6, 2026
Save $4,864 AUD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,833 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.57ct natural radiant diamond

This 1.57ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 770664057. Listed at 15 retailers as of November 5, 2026, with prices from $3,969 to $8,833, a $4,864 spread on the same certified stone. NZ Jewellers lists it at $8,833. 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

1.57
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.8°
Pavilion angle35.2°
OriginNatural
Grading LabIGI
CertificateIGI 770664057
Dimensions7.67 × 5.83 × 4.03 mm
L/W Ratio1.32
Girdle conditionFaceted
Culet sizePointed
Top View
7.67 mm5.83 mm1.57 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 770664057
Side View
Table 72.0%Crown 40.8°Girdle: MED-STKPavilion 35.2°Culet: NoneDepth 69.1%

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: $8,434 AUD|Low: $3,969 AUD|High: $8,568 AUD|Avg: $5,732 AUD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$3,969 AUD
Retailer 4$4,784 AUD
Retailer 2$5,341 AUD
Retailer 5$5,903 AUD
Retailer 6$6,188 AUD
Retailer 1$8,434 AUD

28 data points across 6 retailers

15 retailers$3,969 AUD to $8,833 AUD

A
Cheapest Retailer
-
$3,969 AUD
A
Retailer 2
-
$4,502 AUD
View
Retailer 3
-
$4,730 AUD
View
Price last confirmed 95 days ago
A
Retailer 4
-
$4,784 AUD
View
B+
Retailer 5
-
$4,883 AUD
View
B+
Retailer 6
-
$5,071 AUD
View
Retailer 7
-
$5,071 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$5,266 AUD
View
B+
Retailer 9
-
$5,280 AUD
View
A
Retailer 10
-
$5,341 AUD
View
B+
Retailer 11
-
$5,851 AUD
View
A
Retailer 12
-
$5,903 AUD
View
B+
Retailer 13
-
$6,188 AUD
View
B+
Retailer 14
-
$8,434 AUD
View
Most Expensive
B+
NZ Jewellers
0ecf2490-5f9c-44b3-8ce7-9bf1aa529f16 · Nov 5
$8,833 AUD
$6,069 USD
View
14 more retailers have this diamond
Prices start from $3,969 AUDSave up to $4,864 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
1.57ct Radiant
$3,969 AUD