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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 $4,919 NZD
As of November 6, 2026
Save $6,029 NZD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,948 NZD 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 $4,919 to $10,948, a $6,029 spread on the same certified stone. NZ Jewellers lists it at $10,948. 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: $10,454 NZD|Low: $4,919 NZD|High: $10,620 NZD|Avg: $7,104 NZD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$4,919 NZD
Retailer 4$5,929 NZD
Retailer 2$6,620 NZD
Retailer 5$7,317 NZD
Retailer 6$7,670 NZD
Retailer 1$10,454 NZD

28 data points across 6 retailers

15 retailers$4,919 NZD to $10,948 NZD

A
Cheapest Retailer
-
$4,919 NZD
A
Retailer 2
-
$5,579 NZD
View
Retailer 3
-
$5,863 NZD
View
Price last confirmed 95 days ago
A
Retailer 4
-
$5,929 NZD
View
B+
Retailer 5
-
$6,052 NZD
View
B+
Retailer 6
-
$6,285 NZD
View
Retailer 7
-
$6,285 NZD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$6,527 NZD
View
B+
Retailer 9
-
$6,545 NZD
View
A
Retailer 10
-
$6,620 NZD
View
B+
Retailer 11
-
$7,252 NZD
View
A
Retailer 12
-
$7,317 NZD
View
B+
Retailer 13
-
$7,670 NZD
View
B+
Retailer 14
-
$10,454 NZD
View
Most Expensive
B+
NZ Jewellers
0ecf2490-5f9c-44b3-8ce7-9bf1aa529f16 · Nov 5
$10,948 NZD
$6,069 USD
View
14 more retailers have this diamond
Prices start from $4,919 NZDSave up to $6,029 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
1.57ct Radiant
$4,919 NZD