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Marquise|Natural|GIA

1.50ct K SI2 Marquise Natural Diamond

EX • K/SI2 • GIA 6552718770

Certificate GIA 6552718770

Diamond specifications and retailer prices

From $7,139 AUD
As of November 5, 2026
Save $243 AUD (3%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $13,339 AUD at NZ Jewellers · As of October 24, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552718770. Listed at 17 retailers as of November 4, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552718770
Dimensions12.62 × 5.69 × 3.55 mm
L/W Ratio2.22
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Indented Natural, Pinpoint, Extra Facet
Top View
12.62 mm5.69 mm1.50 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552718770
Side View
Table 58.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 62.4%

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 5
Current: $13,339 AUD|Low: $5,923 AUD|High: $13,537 AUD|Avg: $8,483 AUD|-1.5%
NZ Jewellers
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
November 5, 2026
Retailer 6$5,923 AUD
Retailer 12$6,319 AUD
Retailer 16$7,032 AUD
Retailer 2$7,139 AUD
Retailer 4$7,603 AUD
Retailer 10$7,708 AUD
Retailer 3$7,976 AUD
Retailer 5$7,976 AUD
Retailer 11$7,976 AUD
Retailer 9$8,000 AUD
Retailer 8$8,093 AUD
Retailer 13$8,198 AUD
Retailer 15$8,987 AUD
Retailer 7$9,202 AUD
Retailer 14$12,720 AUD
NZ Jewellers$13,339 AUD

27 data points across 16 retailers

17 retailers$7,139 AUD to $7,382 AUD

Retailer 1
-
$5,923 AUD
Price last confirmed 12 days ago
Retailer 2
-
$6,319 AUD
View
Price last confirmed 13 days ago
Retailer 3
-
$7,032 AUD
View
Price last confirmed 14 days ago
B+
Retailer 4
-
$7,139 AUD
View
B+
Retailer 5
-
$7,382 AUD
View
Retailer 6
-
$7,603 AUD
View
Price last confirmed 14 days ago
Retailer 7
-
$7,708 AUD
View
Price last confirmed 12 days ago
Retailer 8
-
$7,976 AUD
View
Price last confirmed 14 days ago
Retailer 9
-
$7,976 AUD
View
Price last confirmed 13 days ago
Retailer 10
-
$7,976 AUD
View
Price last confirmed 13 days ago
Retailer 11
-
$8,093 AUD
View
Price last confirmed 18 days ago
Retailer 12
-
$8,093 AUD
View
Price last confirmed 22 days ago
Retailer 13
-
$8,198 AUD
View
Price last confirmed 12 days ago
Retailer 14
-
$9,202 AUD
View
Price last confirmed 15 days ago
Retailer 15
-
$9,339 AUD
View
Price last confirmed 19 days ago
Retailer 16
-
$12,720 AUD
View
Price last confirmed 13 days ago
Most Expensive
NZ Jewellers
6927d8b1-69da-47b8-ba35-0c7f2a220600 · Oct 24
$13,339 AUD
$9,165 USD
View
Price last confirmed 13 days ago
16 more retailers have this diamond
Prices start from $7,139 AUDSave up to $243 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
$7,139 AUD