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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 HK$21,373 HKD
As of November 6, 2026
Save HK$26,193 HKD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$47,565 HKD 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 HK$21,373 to HK$47,565, a HK$26,193 spread on the same certified stone. NZ Jewellers lists it at HK$47,565. 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: HK$45,418 HKD|Low: HK$21,373 HKD|High: HK$46,139 HKD|Avg: HK$30,866 HKD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3HK$21,373 HKD
Retailer 4HK$25,762 HKD
Retailer 2HK$28,763 HKD
Retailer 5HK$31,788 HKD
Retailer 6HK$33,325 HKD
Retailer 1HK$45,418 HKD

28 data points across 6 retailers

15 retailersHK$21,373 HKD to HK$47,565 HKD

A
Cheapest Retailer
-
HK$21,373 HKD
A
Retailer 2
-
HK$24,241 HKD
View
Retailer 3
-
HK$25,472 HKD
View
Price last confirmed 95 days ago
A
Retailer 4
-
HK$25,762 HKD
View
B+
Retailer 5
-
HK$26,294 HKD
View
B+
Retailer 6
-
HK$27,306 HKD
View
Retailer 7
-
HK$27,306 HKD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
HK$28,356 HKD
View
B+
Retailer 9
-
HK$28,434 HKD
View
A
Retailer 10
-
HK$28,763 HKD
View
B+
Retailer 11
-
HK$31,506 HKD
View
A
Retailer 12
-
HK$31,788 HKD
View
B+
Retailer 13
-
HK$33,325 HKD
View
B+
Retailer 14
-
HK$45,418 HKD
View
Most Expensive
B+
NZ Jewellers
0ecf2490-5f9c-44b3-8ce7-9bf1aa529f16 · Nov 5
HK$47,565 HKD
$6,069 USD
View
14 more retailers have this diamond
Prices start from HK$21,373 HKDSave up to HK$26,193 HKD

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
HK$21,373 HKD