Round|Natural|GIA

1.50ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 6495040258

Certificate GIA 6495040258

Diamond specifications and retailer prices

From $9,369 AUD
$6,581 USD
As of October 30, 2026
Save $7,892 AUD (46%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $20,715 AUD at NZ Jewellers · As of September 21, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6495040258. Listed at 26 retailers as of October 30, 2026, with a 84% 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6495040258
Dimensions7.29 × 7.35 × 4.57 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Top View
7.29 mm7.35 mm1.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6495040258
Side View
Table 58.0%Crown 34°Girdle: THN-STKPavilion 41.8°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $17,261 AUD|Low: $8,187 AUD|High: $17,469 AUD|Avg: $11,598 AUD|-0.1%
Retailer 1
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
Retailer 20
Retailer 21
November 1, 2026
Retailer 4$9,369 AUD
Retailer 3$9,698 AUD
Retailer 17$9,825 AUD
Retailer 14$9,947 AUD
Retailer 13$10,342 AUD
Retailer 21$10,355 AUD
Retailer 2$10,357 AUD
Retailer 9$11,033 AUD
Retailer 6$11,406 AUD
Retailer 20$11,461 AUD
Retailer 15$11,462 AUD
Retailer 10$11,592 AUD
Retailer 18$11,727 AUD
Retailer 5$12,343 AUD
Retailer 8$12,343 AUD
Retailer 11$12,425 AUD
Retailer 19$12,518 AUD
Retailer 7$12,755 AUD
Retailer 12$13,253 AUD
Retailer 16$15,215 AUD
Retailer 1$17,261 AUD

36 data points across 21 retailers

26 retailers$9,369 AUD to $17,261 AUD

A
Cheapest Retailer
-
$9,369 AUD
$6,581 USD
A
Retailer 2
-
$9,645 AUD
View
A
Retailer 3
-
$9,698 AUD
$6,812 USD
View
B+
Retailer 4
-
$9,825 AUD
$6,901 USD
View
B+
Retailer 5
-
$9,947 AUD
$6,987 USD
View
B+
Retailer 6
-
$10,342 AUD
$7,265 USD
View
B+
Retailer 7
-
$10,355 AUD
$7,274 USD
View
Final sale: no returns
B+
Retailer 8
-
$11,033 AUD
$7,750 USD
View
Retailer 9
-
$11,221 AUD
$7,882 USD
View
Price last confirmed 38 days ago
Retailer 10
-
$11,221 AUD
$7,882 USD
View
Price last confirmed 31 days ago
Retailer 11
-
$11,393 AUD
$8,003 USD
View
Price last confirmed 32 days ago
Retailer 12
-
$11,406 AUD
$8,012 USD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$11,461 AUD
$8,051 USD
View
B+
Retailer 14
-
$11,462 AUD
£6,340 GBP
View
B+
Retailer 15
-
$11,592 AUD
$8,143 USD
View
Retailer 16
-
$11,727 AUD
View
Price last confirmed 10 days ago
B+
Retailer 17
-
$12,343 AUD
$8,670 USD
View
B+
Retailer 18
-
$12,343 AUD
$8,670 USD
View
B+
Retailer 19
-
$12,425 AUD
$8,728 USD
View
B+
Retailer 20
-
$12,518 AUD
$8,793 USD
View
B
Retailer 21
-
$12,755 AUD
$8,960 USD
View
Retailer 22
-
$12,946 AUD
$9,094 USD
View
Price last confirmed 40 days ago
B+
Retailer 23
-
$13,253 AUD
€8,866 EUR
View
B
Retailer 24
-
$15,215 AUD
ZAR 172,665 ZAR
View
B
Retailer 25
-
$17,261 AUD
£9,547 GBP
View
Most Expensive
NZ Jewellers
7ab3af2b-e4b4-4889-8735-bb9ac1c585be · Sep 21
$20,715 AUD
$14,551 USD
View
Price last confirmed 41 days ago
25 more retailers have this diamond
Prices start from $9,369 AUDSave up to $7,892 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.

A
1.50ct Round
$9,369 AUD