Round|Natural|GIA

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6491906860

Certificate GIA 6491906860

Diamond specifications and retailer prices

From $8,286 NZD
$4,670 USD
As of November 1, 2026
Save $7,600 NZD (48%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $18,034 NZD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct 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 6491906860. Listed at 21 retailers as of November 1, 2026, with a 92% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6491906860
Dimensions7.37 × 7.35 × 4.51 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
7.37 mm7.35 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6491906860
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.3%

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: $12,879 NZD|Low: $7,514 NZD|High: $16,078 NZD|Avg: $11,474 NZD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6$8,286 NZD
Retailer 7$9,017 NZD
Retailer 3$10,276 NZD
Retailer 8$10,715 NZD
Retailer 5$11,117 NZD
Retailer 1$12,879 NZD
Retailer 4$13,248 NZD
Retailer 2$15,886 NZD

39 data points across 8 retailers

21 retailers$8,286 NZD to $15,886 NZD

Cheapest Retailer
-
$8,286 NZD
$4,670 USD
B+
Retailer 2
-
$8,518 NZD
$4,801 USD
View
B+
Retailer 3
-
$8,747 NZD
$4,930 USD
View
B
Retailer 4
-
$9,017 NZD
$5,082 USD
View
Final sale: no returns
B+
Retailer 5
-
$9,147 NZD
$5,155 USD
View
B
Retailer 6
-
$9,408 NZD
$5,303 USD
View
B
Retailer 7
-
$9,654 NZD
$5,441 USD
View
Retailer 8
-
$9,768 NZD
$5,505 USD
View
Price last confirmed 31 days ago
Retailer 9
-
$9,768 NZD
$5,505 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
$10,276 NZD
£4,560 GBP
View
Retailer 11
-
$10,715 NZD
A$9,291 AUD
View
Price last confirmed 28 days ago
B
Retailer 12
-
$10,912 NZD
$6,150 USD
View
B
Retailer 13
-
$10,912 NZD
$6,150 USD
View
B
Retailer 14
-
$11,117 NZD
€5,967 EUR
View
Retailer 15
-
$11,270 NZD
$6,352 USD
View
Price last confirmed 33 days ago
B
Retailer 16
-
$11,285 NZD
$6,360 USD
View
Retailer 17
-
$11,890 NZD
$6,701 USD
View
Price last confirmed 9 days ago
B
Retailer 18
-
$12,879 NZD
£5,715 GBP
View
B
Retailer 19
-
$13,248 NZD
ZAR 120,620 ZAR
View
B
Retailer 20
-
$15,886 NZD
£7,050 GBP
View
Most Expensive
NZ Jewellers
83772850-e0ac-4468-a4d2-bf82afc77711 · Sep 28
$18,034 NZD
$10,164 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from $8,286 NZDSave up to $7,600 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+
1.50ct Round
$8,286 NZD