Round|Natural|GIA

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6491906860

Certificate GIA 6491906860

Diamond specifications and retailer prices

From $6,648 AUD
$4,670 USD
As of October 25, 2026
Save $6,114 AUD (48%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $14,469 AUD 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 October 25, 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: Oct 25
Current: $10,629 AUD|Low: $6,029 AUD|High: $12,900 AUD|Avg: $9,192 AUD|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6$6,648 AUD
Retailer 7$7,235 AUD
Retailer 2$8,245 AUD
Retailer 8$8,597 AUD
Retailer 4$8,919 AUD
Retailer 3$10,364 AUD
Retailer 1$10,629 AUD
Retailer 5$12,762 AUD

40 data points across 8 retailers

21 retailers$6,648 AUD to $12,762 AUD

B+
Cheapest Retailer
-
$6,648 AUD
$4,670 USD
B+
Retailer 2
-
$6,835 AUD
$4,801 USD
View
B+
Retailer 3
-
$7,018 AUD
$4,930 USD
View
B
Retailer 4
-
$7,235 AUD
$5,082 USD
View
Final sale: no returns
B+
Retailer 5
-
$7,339 AUD
$5,155 USD
View
B
Retailer 6
-
$7,549 AUD
$5,303 USD
View
B
Retailer 7
-
$7,746 AUD
$5,441 USD
View
Retailer 8
-
$7,837 AUD
$5,505 USD
View
Price last confirmed 30 days ago
Retailer 9
-
$7,837 AUD
$5,505 USD
View
Price last confirmed 32 days ago
B+
Retailer 10
-
$8,245 AUD
£4,560 GBP
View
Retailer 11
-
$8,597 AUD
View
Price last confirmed 28 days ago
B
Retailer 12
-
$8,755 AUD
$6,150 USD
View
B
Retailer 13
-
$8,755 AUD
$6,150 USD
View
B
Retailer 14
-
$8,919 AUD
€5,967 EUR
View
Retailer 15
-
$9,043 AUD
$6,352 USD
View
Price last confirmed 32 days ago
B
Retailer 16
-
$9,054 AUD
$6,360 USD
View
Retailer 17
-
$9,540 AUD
$6,701 USD
View
Price last confirmed 9 days ago
B
Retailer 18
-
$10,364 AUD
£5,733 GBP
View
B
Retailer 19
-
$10,629 AUD
ZAR 120,620 ZAR
View
B
Retailer 20
-
$12,762 AUD
£7,059 GBP
View
Most Expensive
NZ Jewellers
83772850-e0ac-4468-a4d2-bf82afc77711 · Sep 28
$14,469 AUD
$10,164 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from $6,648 AUDSave up to $6,114 AUD

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
$6,648 AUD