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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6501583878

Certificate GIA 6501583878

Diamond specifications and retailer prices

From $10,353 NZD
$5,835 USD
As of November 1, 2026
Save $11,719 NZD (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $22,072 NZD at NZ Jewellers · As of October 30, 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 6501583878. Listed at 18 retailers as of October 30, 2026, with prices from $10,353 to $22,072, a $11,719 spread on the same certified stone. NZ Jewellers lists it at $22,072. 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 angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6501583878
Dimensions7.35 × 7.30 × 4.60 mm
L/W Ratio1.01
Top View
7.35 mm7.30 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6501583878
Side View
Table 57.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.8%

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: $15,762 NZD|Low: $10,353 NZD|High: $18,613 NZD|Avg: $13,415 NZD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$10,353 NZD
Retailer 11$10,428 NZD
Retailer 10$11,089 NZD
Retailer 2$12,140 NZD
Retailer 4$12,359 NZD
Retailer 3$12,654 NZD
Retailer 8$12,809 NZD
Retailer 6$14,356 NZD
Retailer 1$15,762 NZD
Retailer 7$16,214 NZD
Retailer 5$18,392 NZD

36 data points across 11 retailers

18 retailers$10,353 NZD to $22,072 NZD

B+
Cheapest Retailer
-
$10,353 NZD
$5,835 USD
B+
Retailer 2
-
$10,428 NZD
$5,877 USD
View
B
Retailer 3
-
$11,036 NZD
$6,220 USD
View
B
Retailer 4
-
$11,089 NZD
$6,250 USD
View
B
Retailer 5
-
$11,763 NZD
$6,630 USD
View
B
Retailer 6
-
$11,955 NZD
$6,738 USD
View
B
Retailer 7
-
$12,140 NZD
$6,842 USD
View
B
Retailer 8
-
$12,359 NZD
£5,485 GBP
View
B
Retailer 9
-
$12,654 NZD
$7,132 USD
View
Retailer 10
-
$12,809 NZD
A$11,106 AUD
View
Price last confirmed 11 days ago
Retailer 11
-
$13,795 NZD
$7,775 USD
View
Price last confirmed 56 days ago
B
Retailer 12
-
$13,795 NZD
$7,775 USD
View
B
Retailer 13
-
$14,356 NZD
€7,706 EUR
View
Retailer 14
-
$14,542 NZD
$8,196 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$15,762 NZD
£6,995 GBP
View
B
Retailer 16
-
$16,214 NZD
ZAR 147,633 ZAR
View
B
Retailer 17
-
$18,392 NZD
£8,162 GBP
View
Most Expensive
B
NZ Jewellers
f4d4f422-75b9-49b3-bb55-82b45c3d718f · Oct 30
$22,072 NZD
$12,440 USD
View
17 more retailers have this diamond
Prices start from $10,353 NZDSave up to $11,719 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
$10,353 NZD