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Marquise|Natural|GIA

1.51ct G SI2 Marquise Natural Diamond

ID • G/SI2 • GIA 6565040217

Certificate GIA 6565040217

Diamond specifications and retailer prices

From $12,083 AUD
$8,468 USD
As of November 1, 2026
Save $8,074 AUD (40%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $23,209 AUD at NZ Jewellers · As of September 20, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565040217. Listed at 17 retailers as of November 1, 2026, with a 67% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565040217
Dimensions12.05 × 6.05 × 3.39 mm
L/W Ratio1.99
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Cloud
Top View
12.05 mm6.05 mm1.51 ctG / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565040217
Side View
Table 57.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 56.1%

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 1
Current: $16,259 AUD|Low: $10,222 AUD|High: $23,774 AUD|Avg: $13,915 AUD|-14.5%
Retailer 1
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 2, 2026
Retailer 5$10,301 AUD
Retailer 7$10,760 AUD
Retailer 6$11,402 AUD
Retailer 2$12,083 AUD
Retailer 4$12,905 AUD
Retailer 12$12,906 AUD
Retailer 14$13,013 AUD
Retailer 8$13,039 AUD
Retailer 9$14,001 AUD
Retailer 3$15,211 AUD
Retailer 15$15,211 AUD
Retailer 13$15,678 AUD
Retailer 16$15,710 AUD
Retailer 1$16,259 AUD
Retailer 11$16,986 AUD
Retailer 10$20,157 AUD

30 data points across 16 retailers

17 retailers$12,083 AUD to $20,157 AUD

Retailer 1
-
$10,301 AUD
HK$56,400 HKD
Price last confirmed 31 days ago
Retailer 2
-
$11,402 AUD
SGD 10,798 SGD
View
Price last confirmed 31 days ago
A
Retailer 3
-
$12,083 AUD
$8,468 USD
View
B+
Retailer 4
-
$12,905 AUD
$9,044 USD
View
Final sale: no returns
B+
Retailer 5
-
$12,906 AUD
$9,045 USD
View
B+
Retailer 6
-
$13,013 AUD
$9,120 USD
View
B+
Retailer 7
-
$13,039 AUD
View
Retailer 8
-
$13,877 AUD
$9,725 USD
View
Price last confirmed 41 days ago
B+
Retailer 9
-
$14,001 AUD
£7,726 GBP
View
B+
Retailer 10
-
$15,211 AUD
$10,660 USD
View
B+
Retailer 11
-
$15,211 AUD
$10,660 USD
View
B
Retailer 12
-
$15,288 AUD
$10,714 USD
View
B
Retailer 13
-
$15,678 AUD
$10,988 USD
View
B+
Retailer 14
-
$15,710 AUD
$11,010 USD
View
B+
Retailer 15
-
$16,259 AUD
€10,852 EUR
View
B
Retailer 16
-
$20,157 AUD
£11,123 GBP
View
Most Expensive
NZ Jewellers
b9fa1f04-0e00-4244-9a85-fdb31e76653a · Sep 20
$23,209 AUD
$16,265 USD
View
Price last confirmed 43 days ago
16 more retailers have this diamond
Prices start from $12,083 AUDSave up to $8,074 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
$12,083 AUD