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Marquise|Natural|GIA

1.50ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 6455423519

Certificate GIA 6455423519

Diamond specifications and retailer prices

From $15,426 AUD
$10,811 USD
As of November 1, 2026
Save $12,014 AUD (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $27,441 AUD at NZ Jewellers · As of November 3, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6455423519. Listed at 9 retailers as of November 1, 2026, with prices from $15,426 to $27,441, a $12,014 spread on the same certified stone. NZ Jewellers lists it at $27,441. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6455423519
Dimensions11.42 × 6.01 × 3.62 mm
L/W Ratio1.90
Top View
11.42 mm6.01 mm1.50 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6455423519
Side View
TableCrownGirdle: STK-VTKPavilionCulet: NoneDepth

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $27,441 AUD|Low: $12,710 AUD|High: $27,441 AUD|Avg: $18,400 AUD
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
November 2, 2026
Retailer 15$12,710 AUD
Retailer 14$15,426 AUD
Retailer 13$15,784 AUD
Retailer 3$16,369 AUD
Retailer 8$16,464 AUD
Retailer 12$16,464 AUD
Retailer 10$17,836 AUD
Retailer 9$18,110 AUD
Retailer 4$19,774 AUD
Retailer 5$19,805 AUD
Retailer 7$19,805 AUD
Retailer 2$20,038 AUD
Retailer 6$20,462 AUD
Retailer 11$20,580 AUD
NZ Jewellers$27,441 AUD

18 data points across 15 retailers

9 retailers$15,426 AUD to $27,441 AUD

B
Cheapest Retailer
-
$15,426 AUD
$10,811 USD
B
Retailer 2
-
$15,784 AUD
CA$15,364 CAD
View
C
Retailer 3
-
$16,464 AUD
$11,538 USD
View
Final sale: no returns
C
Retailer 4
-
$17,836 AUD
$12,500 USD
View
C
Retailer 5
-
$18,110 AUD
$12,692 USD
View
C
Retailer 6
-
$20,038 AUD
€13,374 EUR
View
Retailer 7
-
$20,580 AUD
$14,423 USD
View
Price last confirmed 57 days ago
C
Retailer 8
-
$20,580 AUD
$14,423 USD
View
Most Expensive
C
NZ Jewellers
044d2ac6-c33f-45ad-80ba-b023f12f0ed2 · Nov 3
$27,441 AUD
$19,231 USD
View
8 more retailers have this diamond
Prices start from $15,426 AUDSave up to $12,014 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
$15,426 AUD