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Marquise|Natural|GIA

1.50ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 1549494456

Certificate GIA 1549494456

Diamond specifications and retailer prices

From $16,453 AUD
$11,557 USD
As of November 2, 2026
Save $11,990 AUD (42%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $28,443 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1549494456. Listed at 14 retailers as of November 1, 2026, with prices from $16,453 to $28,443, a $11,990 spread on the same certified stone. MOH London lists it at $28,443. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1549494456
Dimensions11.44 × 5.88 × 3.74 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizeNone
Cert comments
Pinpoints are not shown.
Top View
11.44 mm5.88 mm1.50 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1549494456
Side View
Table 57.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.6%

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 2
Current: $28,443 AUD|Low: $16,266 AUD|High: $28,787 AUD|Avg: $21,091 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6$16,453 AUD
Retailer 4$17,452 AUD
Retailer 5$19,426 AUD
Retailer 3$19,633 AUD
Retailer 8$19,730 AUD
Retailer 10$20,488 AUD
Retailer 9$20,627 AUD
Retailer 2$22,940 AUD
Retailer 7$25,800 AUD
MOH London$28,443 AUD

43 data points across 10 retailers

14 retailers$16,453 AUD to $28,443 AUD

B+
Cheapest Retailer
-
$16,453 AUD
$11,557 USD
B+
Retailer 2
-
$17,065 AUD
$11,987 USD
View
B+
Retailer 3
-
$17,325 AUD
View
B+
Retailer 4
-
$17,452 AUD
$12,259 USD
View
Final sale: no returns
B+
Retailer 5
-
$17,606 AUD
$12,367 USD
View
B+
Retailer 6
-
$19,426 AUD
$13,646 USD
View
B+
Retailer 7
-
$19,633 AUD
£10,859 GBP
View
B+
Retailer 8
-
$19,730 AUD
$13,859 USD
View
B+
Retailer 9
-
$20,488 AUD
$14,392 USD
View
B
Retailer 10
-
$20,627 AUD
$14,489 USD
View
B
Retailer 11
-
$21,581 AUD
$15,159 USD
View
B
Retailer 12
-
$22,940 AUD
€15,347 EUR
View
B
Retailer 13
-
$25,800 AUD
$18,123 USD
View
Most Expensive
B
MOH London
4652BB7B6 · Nov 1
$28,443 AUD
£15,732 GBP
View
13 more retailers have this diamond
Prices start from $16,453 AUDSave up to $11,990 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 Marquise
$16,453 AUD