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Marquise|Natural|GIA

1.50ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6565065857

Certificate GIA 6565065857

Diamond specifications and retailer prices

From $6,407 AUD
As of November 6, 2026
Save $7,871 AUD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $14,277 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565065857. Listed at 13 retailers as of November 5, 2026, with prices from $6,407 to $14,277, a $7,871 spread on the same certified stone. NZ Jewellers lists it at $14,277. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6565065857
Dimensions11.59 × 5.94 × 3.74 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather
Top View
11.59 mm5.94 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6565065857
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NDepth 63.0%

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: Nov 6
Current: $6,407 AUD|Low: $6,407 AUD|High: $12,710 AUD|Avg: $8,928 AUD|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$6,407 AUD
Retailer 3$8,245 AUD
Retailer 6$8,393 AUD
Retailer 7$8,537 AUD
Retailer 2$9,073 AUD
Retailer 4$10,415 AUD
Retailer 5$12,543 AUD

39 data points across 7 retailers

13 retailers$6,407 AUD to $14,277 AUD

A
Cheapest Retailer
-
$6,407 AUD
B+
Retailer 2
-
$7,444 AUD
View
B+
Retailer 3
-
$7,968 AUD
View
B+
Retailer 4
-
$8,245 AUD
View
B+
Retailer 5
-
$8,393 AUD
View
B+
Retailer 6
-
$8,537 AUD
View
B+
Retailer 7
-
$8,537 AUD
View
Retailer 8
-
$8,537 AUD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$9,073 AUD
View
B
Retailer 10
-
$9,850 AUD
View
B
Retailer 11
-
$10,415 AUD
View
B
Retailer 12
-
$12,543 AUD
View
Most Expensive
C
NZ Jewellers
458019e7-53cd-4f55-8ba8-b7a5cfd52f88 · Nov 5
$14,277 AUD
$9,810 USD
View
12 more retailers have this diamond
Prices start from $6,407 AUDSave up to $7,871 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 Marquise
$6,407 AUD