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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6425906823

Certificate GIA 6425906823

Diamond specifications and retailer prices

From $8,531 NZD
HK$37,500 HKD
As of November 1, 2026
Save $10,854 NZD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $19,385 NZD at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct 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 6425906823. Listed at 19 retailers as of November 1, 2026, with prices from $8,531 to $19,385, a $10,854 spread on the same certified stone. NZ Jewellers lists it at $19,385. 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6425906823
Dimensions7.31 × 7.27 × 4.55 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6425906823
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

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 1
Current: $19,385 NZD|Low: $8,387 NZD|High: $19,385 NZD|Avg: $12,039 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 15$8,531 NZD
Retailer 18$9,171 NZD
Retailer 5$9,692 NZD
Retailer 16$9,775 NZD
Retailer 6$10,500 NZD
Retailer 8$10,500 NZD
Retailer 19$10,500 NZD
Retailer 2$10,952 NZD
Retailer 7$11,712 NZD
Retailer 9$11,712 NZD
Retailer 11$11,716 NZD
Retailer 10$11,870 NZD
Retailer 17$12,103 NZD
Retailer 3$12,116 NZD
Retailer 12$12,608 NZD
Retailer 4$12,777 NZD
Retailer 14$14,240 NZD
Retailer 13$17,075 NZD
NZ Jewellers$19,385 NZD

43 data points across 19 retailers

19 retailers$8,531 NZD to $19,385 NZD

B+
Cheapest Retailer
-
$8,531 NZD
HK$37,500 HKD
B+
Retailer 2
-
$9,171 NZD
$5,160 USD
View
B
Retailer 3
-
$9,692 NZD
$5,453 USD
View
Final sale: no returns
B
Retailer 4
-
$9,775 NZD
$5,500 USD
View
B
Retailer 5
-
$10,500 NZD
$5,908 USD
View
B
Retailer 6
-
$10,500 NZD
$5,908 USD
View
B
Retailer 7
-
$10,500 NZD
$5,908 USD
View
B+
Retailer 8
-
$10,952 NZD
£4,852 GBP
View
B
Retailer 9
-
$11,712 NZD
$6,590 USD
View
B
Retailer 10
-
$11,712 NZD
$6,590 USD
View
Retailer 11
-
$11,716 NZD
A$10,142 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
$11,870 NZD
$6,679 USD
View
B
Retailer 13
-
$12,103 NZD
$6,810 USD
View
B
Retailer 14
-
$12,116 NZD
$6,817 USD
View
B
Retailer 15
-
$12,608 NZD
€6,756 EUR
View
Retailer 16
-
$12,777 NZD
$7,189 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$14,240 NZD
ZAR 129,441 ZAR
View
B
Retailer 18
-
$17,075 NZD
£7,565 GBP
View
Most Expensive
B
NZ Jewellers
69390dd0-34a5-44b5-99bc-6831c853a27d · Nov 2
$19,385 NZD
$10,907 USD
View
18 more retailers have this diamond
Prices start from $8,531 NZDSave up to $10,854 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+
1.51ct Round
$8,531 NZD