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Round|Natural|GIA

1.50ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6451465789

Certificate GIA 6451465789

Diamond specifications and retailer prices

From $11,403 AUD
$8,010 USD
As of October 25, 2026
Save $12,517 AUD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $23,920 AUD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6451465789. Listed at 16 retailers as of October 25, 2026, with prices from $11,403 to $23,920, a $12,517 spread on the same certified stone. Diamond Quarter lists it at $23,920. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6451465789
Dimensions7.37 × 7.33 × 4.54 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Top View
7.37 mm7.33 mm1.50 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6451465789
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.8%

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 25
Current: $13,476 AUD|Low: $10,345 AUD|High: $19,622 AUD|Avg: $14,166 AUD|-0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 4$11,403 AUD
Retailer 8$11,500 AUD
Retailer 5$12,414 AUD
Retailer 6$13,449 AUD
Retailer 1$13,476 AUD
Retailer 2$15,493 AUD
Retailer 7$16,339 AUD
Retailer 3$19,492 AUD

42 data points across 8 retailers

16 retailers$11,403 AUD to $23,920 AUD

A
Cheapest Retailer
-
$11,403 AUD
$8,010 USD
A
Retailer 2
-
$11,622 AUD
$8,164 USD
View
B+
Retailer 3
-
$12,414 AUD
$8,720 USD
View
B+
Retailer 4
-
$12,414 AUD
$8,720 USD
View
Final sale: no returns
B+
Retailer 5
-
$13,449 AUD
$9,447 USD
View
B+
Retailer 6
-
$13,476 AUD
£7,454 GBP
View
B+
Retailer 7
-
$13,655 AUD
$9,592 USD
View
B+
Retailer 8
-
$14,663 AUD
$10,300 USD
View
B+
Retailer 9
-
$14,663 AUD
$10,300 USD
View
B+
Retailer 10
-
$15,147 AUD
$10,640 USD
View
B+
Retailer 11
-
$15,493 AUD
€10,365 EUR
View
B+
Retailer 12
-
$15,517 AUD
$10,900 USD
View
Retailer 13
-
$16,339 AUD
$11,477 USD
View
Price last confirmed 7 days ago
B
Retailer 14
-
$19,492 AUD
£10,781 GBP
View
B
Retailer 15
-
$20,689 AUD
$14,533 USD
View
Most Expensive
B
Diamond Quarter
1.5SI2D648989CAN · Oct 29
$23,920 AUD
£13,230 GBP
View
15 more retailers have this diamond
Prices start from $11,403 AUDSave up to $12,517 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
$11,403 AUD