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Marquise|Natural|GIA

1.51ct E SI2 Marquise Natural Diamond

ID • E/SI2 • GIA 6551704674

Certificate GIA 6551704674

Diamond specifications and retailer prices

From $9,737 AUD
£5,386 GBP
As of October 30, 2026
Save $9,010 AUD (48%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $18,747 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 E 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 6551704674. Listed at 8 retailers as of October 30, 2026, with prices from $9,737 to $18,747, a $9,010 spread on the same certified stone. NZ Jewellers lists it at $18,747. 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
E
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551704674
Dimensions10.50 × 5.91 × 3.95 mm
L/W Ratio1.78
Top View
10.50 mm5.91 mm1.51 ctE / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551704674
Side View
Table 61.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 66.8%

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: Oct 30
Current: $18,747 AUD|Low: $9,679 AUD|High: $18,972 AUD|Avg: $11,484 AUD|-1.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 3$9,737 AUD
Retailer 7$9,820 AUD
Retailer 8$9,979 AUD
Retailer 2$10,594 AUD
Retailer 5$11,209 AUD
Retailer 4$11,382 AUD
Retailer 6$15,706 AUD
NZ Jewellers$18,747 AUD

36 data points across 8 retailers

8 retailers$9,737 AUD to $18,747 AUD

A
Cheapest Retailer
-
$9,737 AUD
£5,386 GBP
A
Retailer 2
-
$9,820 AUD
$6,898 USD
View
A
Retailer 3
-
$9,979 AUD
$7,010 USD
View
A
Retailer 4
-
$10,594 AUD
£5,860 GBP
View
A
Retailer 5
-
$11,209 AUD
$7,874 USD
View
A
Retailer 6
-
$11,382 AUD
$7,995 USD
View
B+
Retailer 7
-
$15,706 AUD
£8,687 GBP
View
Most Expensive
B+
NZ Jewellers
35a4231b-b749-454d-af27-01c6914e6792 · Oct 30
$18,747 AUD
$13,169 USD
View
7 more retailers have this diamond
Prices start from $9,737 AUDSave up to $9,010 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
$9,737 AUD