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Marquise|Natural|GIA

1.51ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 5553877458

Certificate GIA 5553877458

Diamond specifications and retailer prices

From $11,721 AUD
₹782,323 INR
As of November 2, 2026
Save $9,784 AUD (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $21,505 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553877458. Listed at 14 retailers as of October 30, 2026, with prices from $11,721 to $21,505, a $9,784 spread on the same certified stone. NZ Jewellers lists it at $21,505. 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

1.51
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5553877458
Dimensions13.58 × 5.56 × 3.16 mm
L/W Ratio2.44
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Twinning Wisp, Needle
Top View
13.58 mm5.56 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5553877458
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NDepth 56.9%

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 2
Current: $11,721 AUD|Low: $11,697 AUD|High: $20,394 AUD|Avg: $15,118 AUD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 1$11,721 AUD
Retailer 5$12,403 AUD
Retailer 3$13,997 AUD
Retailer 7$15,429 AUD
Retailer 2$15,480 AUD
Retailer 6$15,666 AUD
Retailer 4$20,151 AUD

43 data points across 7 retailers

14 retailers$11,721 AUD to $21,505 AUD

A
Cheapest Retailer
-
$11,721 AUD
₹782,323 INR
A
Retailer 2
-
$12,403 AUD
$8,692 USD
View
Final sale: no returns
A
Retailer 3
-
$13,056 AUD
$9,150 USD
View
A
Retailer 4
-
$13,215 AUD
$9,261 USD
View
A
Retailer 5
-
$13,997 AUD
£7,724 GBP
View
B+
Retailer 6
-
$14,242 AUD
$9,981 USD
View
B+
Retailer 7
-
$15,429 AUD
$10,813 USD
View
B+
Retailer 8
-
$15,480 AUD
€10,332 EUR
View
B+
Retailer 9
-
$15,666 AUD
$10,979 USD
View
B+
Retailer 10
-
$15,787 AUD
$11,064 USD
View
B
Retailer 11
-
$17,803 AUD
$12,477 USD
View
Retailer 12
-
$18,457 AUD
$12,935 USD
View
Price last confirmed 57 days ago
B
Retailer 13
-
$20,151 AUD
£11,120 GBP
View
Most Expensive
B
NZ Jewellers
4acfa7d8-9450-421e-80a5-34c289f89a5a · Oct 30
$21,505 AUD
$15,071 USD
View
13 more retailers have this diamond
Prices start from $11,721 AUDSave up to $9,784 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
1.51ct Marquise
$11,721 AUD