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Marquise|Natural|GIA

1.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6565156521

Certificate GIA 6565156521

Diamond specifications and retailer prices

From $9,806 AUD
As of November 6, 2026
Save $6,799 AUD (41%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $16,606 AUD at MOH London · As of November 4, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565156521. Listed at 14 retailers as of November 4, 2026, with prices from $9,806 to $16,606, a $6,799 spread on the same certified stone. MOH London lists it at $16,606. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6565156521
Dimensions11.05 × 5.97 × 3.68 mm
L/W Ratio1.85
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Indented Natural, Cavity, Pinpoint, Natural
Top View
11.05 mm5.97 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6565156521
Side View
Table 58.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 61.6%

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 6
Current: $16,606 AUD|Low: $8,936 AUD|High: $16,850 AUD|Avg: $11,629 AUD|-1.3%
MOH London
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
November 6, 2026
Retailer 5$9,806 AUD
Retailer 9$10,034 AUD
Retailer 11$10,354 AUD
Retailer 8$10,988 AUD
Retailer 10$11,150 AUD
Retailer 7$11,272 AUD
Retailer 6$11,295 AUD
Retailer 12$11,547 AUD
Retailer 3$12,065 AUD
Retailer 4$12,065 AUD
Retailer 13$12,176 AUD
Retailer 14$12,458 AUD
Retailer 2$12,979 AUD
MOH London$16,606 AUD

36 data points across 14 retailers

14 retailers$9,806 AUD to $16,606 AUD

B+
Cheapest Retailer
-
$9,806 AUD
B
Retailer 2
-
$10,034 AUD
View
B
Retailer 3
-
$10,354 AUD
View
B
Retailer 4
-
$10,988 AUD
View
B
Retailer 5
-
$11,150 AUD
View
B+
Retailer 6
-
$11,272 AUD
View
B
Retailer 7
-
$11,295 AUD
View
B
Retailer 8
-
$11,547 AUD
View
B
Retailer 9
-
$12,065 AUD
View
B
Retailer 10
-
$12,065 AUD
View
B
Retailer 11
-
$12,176 AUD
View
B
Retailer 12
-
$12,458 AUD
View
B
Retailer 13
-
$12,979 AUD
View
Most Expensive
B
MOH London
33DFA88A3 · Nov 4
$16,606 AUD
£8,984 GBP
View
13 more retailers have this diamond
Prices start from $9,806 AUDSave up to $6,799 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
$9,806 AUD