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1.57ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 3505260431

Certificate GIA 3505260431

Diamond specifications and retailer prices

From $9,065 NZD
$5,109 USD
As of November 2, 2026
Save $7,860 NZD (46%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $16,925 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.57ct natural round diamond

This 1.57ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3505260431. Listed at 4 retailers as of October 30, 2026, with prices from $9,065 to $16,925, a $7,860 spread on the same certified stone. NZ Jewellers lists it at $16,925. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.57
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3505260431
Dimensions7.37 × 7.40 × 4.63 mm
L/W Ratio1.00
Top View
7.37 mm7.40 mm1.57 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3505260431
Side View
Table 57.0%Crown 35.5°GirdlePavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $16,925 NZD|Low: $8,170 NZD|High: $17,010 NZD|Avg: $10,975 NZD|+9.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 6$8,170 NZD
Retailer 4$9,065 NZD
Retailer 8$9,909 NZD
Retailer 10$10,054 NZD
Retailer 2$10,121 NZD
Retailer 3$10,121 NZD
Retailer 9$10,517 NZD
Retailer 7$10,570 NZD
Retailer 5$14,771 NZD
NZ Jewellers$16,925 NZD

6 data points across 10 retailers

4 retailers$9,065 NZD to $16,925 NZD

B+
Cheapest Retailer
-
$9,065 NZD
$5,109 USD
B
Retailer 2
-
$10,121 NZD
$5,704 USD
View
B
Retailer 3
-
$10,121 NZD
$5,704 USD
View
Most Expensive
B
NZ Jewellers
e7e69f5a-d8ba-4f71-b61c-4e4f5ae36234 · Oct 30
$16,925 NZD
$9,539 USD
View
3 more retailers have this diamond
Prices start from $9,065 NZDSave up to $7,860 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.

B+
1.57ct Round
$9,065 NZD