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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 $2,727 USD
As of November 6, 2026
Save $3,342 USD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,069 USD 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 $2,727 to $6,069, a $3,342 spread on the same certified stone. NZ Jewellers lists it at $6,069. 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
Color
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: $3,670 USD|Low: $2,727 USD|High: $5,887 USD|Avg: $3,935 USD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 2$2,727 USD
Retailer 3$3,287 USD
Retailer 1$3,670 USD
Retailer 4$4,056 USD
Retailer 5$4,252 USD
Retailer 6$5,810 USD

28 data points across 6 retailers

15 retailers$2,727 USD to $6,069 USD

A
Cheapest Retailer
-
$2,727 USD
A
Retailer 2
-
$3,093 USD
View
Retailer 3
-
$3,250 USD
View
Price last confirmed 95 days ago
A
Retailer 4
-
$3,287 USD
View
B+
Retailer 5
-
$3,355 USD
View
B+
Retailer 6
-
$3,484 USD
View
Retailer 7
-
$3,484 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,618 USD
View
B+
Retailer 9
-
$3,628 USD
View
A
Retailer 10
-
$3,670 USD
View
B+
Retailer 11
-
$4,020 USD
View
A
Retailer 12
-
$4,056 USD
View
B+
Retailer 13
-
$4,252 USD
View
B+
Retailer 14
-
$5,810 USD
View
Most Expensive
B+
NZ Jewellers
0ecf2490-5f9c-44b3-8ce7-9bf1aa529f16 · Nov 5
$6,069 USD
View
14 more retailers have this diamond
Prices start from $2,727 USDSave up to $3,342 USD

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
$2,727 USD