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Marquise|Natural|GIA

1.50ct K SI1 Marquise Natural Diamond

GD • K/SI1 • GIA 6421532753

Certificate GIA 6421532753

Diamond specifications and retailer prices

From $8,238 AUD
As of November 1, 2026
Save $10,125 AUD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,363 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6421532753. Listed at 16 retailers as of November 1, 2026, with prices from $8,238 to $18,363, a $10,125 spread on the same certified stone. NZ Jewellers lists it at $18,363. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6421532753
Dimensions10.58 × 6.12 × 3.70 mm
L/W Ratio1.73
Top View
10.58 mm6.12 mm1.50 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6421532753
Side View
Table 57.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 60.5%

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 1
Current: $10,646 AUD|Low: $8,238 AUD|High: $15,485 AUD|Avg: $10,952 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6$8,238 AUD
Retailer 8$9,181 AUD
Retailer 9$9,220 AUD
Retailer 7$10,099 AUD
Retailer 3$10,249 AUD
Retailer 1$10,646 AUD
Retailer 2$11,282 AUD
Retailer 4$13,396 AUD
Retailer 5$15,260 AUD

44 data points across 9 retailers

16 retailers$8,238 AUD to $18,363 AUD

B+
Cheapest Retailer
-
$8,238 AUD
B
Retailer 2
-
$8,577 AUD
View
B
Retailer 3
-
$8,674 AUD
View
Retailer 4
-
$9,181 AUD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$9,220 AUD
View
B
Retailer 6
-
$9,258 AUD
View
B
Retailer 7
-
$9,946 AUD
View
B
Retailer 8
-
$10,099 AUD
View
B
Retailer 9
-
$10,249 AUD
View
B
Retailer 10
-
$10,493 AUD
View
B
Retailer 11
-
$10,646 AUD
View
B
Retailer 12
-
$11,282 AUD
View
B
Retailer 13
-
$11,476 AUD
View
C
Retailer 14
-
$13,396 AUD
View
C
Retailer 15
-
$15,260 AUD
View
Most Expensive
C
NZ Jewellers
410d9d39-bdb2-4718-88e0-f9d91a295208 · Nov 5
$18,363 AUD
$12,617 USD
View
15 more retailers have this diamond
Prices start from $8,238 AUDSave up to $10,125 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
$8,238 AUD