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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 $3,495 SGD
As of November 6, 2026
Save $4,283 SGD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,778 SGD 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 $3,495 to $7,778, a $4,283 spread on the same certified stone. NZ Jewellers lists it at $7,778. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $7,427 SGD|Low: $3,495 SGD|High: $7,545 SGD|Avg: $5,047 SGD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$3,495 SGD
Retailer 4$4,213 SGD
Retailer 2$4,703 SGD
Retailer 5$5,198 SGD
Retailer 6$5,449 SGD
Retailer 1$7,427 SGD

28 data points across 6 retailers

15 retailers$3,495 SGD to $7,778 SGD

A
Cheapest Retailer
-
$3,495 SGD
A
Retailer 2
-
$3,964 SGD
View
Retailer 3
-
$4,165 SGD
View
Price last confirmed 95 days ago
A
Retailer 4
-
$4,213 SGD
View
B+
Retailer 5
-
$4,300 SGD
View
B+
Retailer 6
-
$4,465 SGD
View
Retailer 7
-
$4,465 SGD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$4,637 SGD
View
B+
Retailer 9
-
$4,650 SGD
View
A
Retailer 10
-
$4,703 SGD
View
B+
Retailer 11
-
$5,152 SGD
View
A
Retailer 12
-
$5,198 SGD
View
B+
Retailer 13
-
$5,449 SGD
View
B+
Retailer 14
-
$7,427 SGD
View
Most Expensive
B+
NZ Jewellers
0ecf2490-5f9c-44b3-8ce7-9bf1aa529f16 · Nov 5
$7,778 SGD
$6,069 USD
View
14 more retailers have this diamond
Prices start from $3,495 SGDSave up to $4,283 SGD

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
$3,495 SGD