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Marquise|Natural|GIA

1.51ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 6551370864

Certificate GIA 6551370864

Diamond specifications and retailer prices

From $4,412 AUD
SGD 4,178 SGD
As of October 31, 2026
Save $4,690 AUD (52%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,102 AUD at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded J 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 6551370864. Listed at 10 retailers as of October 27, 2026, with prices from $4,412 to $9,102, a $4,690 spread on the same certified stone. Wholesale Diamonds Direct lists it at $9,102. 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.06°
Pavilion angle38.76°
OriginNatural
Grading LabGIA
CertificateGIA 6551370864
Dimensions11.46 × 6.06 × 3.69 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.46 mm6.06 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551370864
Side View
Table 58.0%Crown 38.06°Girdle: MED-THKPavilion 38.76°Culet: NoneDepth 61.0%

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 31
Current: $6,468 AUD|Low: $4,412 AUD|High: $10,220 AUD|Avg: $6,496 AUD|-13.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
November 2, 2026
Retailer 6$4,412 AUD
Retailer 3$4,431 AUD
Retailer 4$5,008 AUD
Retailer 10$5,271 AUD
Retailer 5$5,351 AUD
Retailer 9$5,467 AUD
Retailer 7$6,358 AUD
Retailer 8$6,420 AUD
Retailer 1$6,468 AUD
Retailer 2$6,863 AUD
Retailer 11$8,623 AUD
Wholesale Diamonds Direct$9,102 AUD

30 data points across 12 retailers

10 retailers$4,412 AUD to $9,102 AUD

A
Cheapest Retailer
-
$4,412 AUD
SGD 4,178 SGD
A
Retailer 2
-
$5,008 AUD
$3,510 USD
View
A
Retailer 3
-
$5,271 AUD
$3,694 USD
View
A
Retailer 4
-
$5,351 AUD
$3,750 USD
View
A
Retailer 5
-
$5,467 AUD
SGD 5,178 SGD
View
A
Retailer 6
-
$6,358 AUD
$4,456 USD
View
A
Retailer 7
-
$6,420 AUD
$4,499 USD
View
A
Retailer 8
-
$6,468 AUD
€4,317 EUR
View
B+
Retailer 9
-
$6,863 AUD
$4,810 USD
View
Most Expensive
B+
Wholesale Diamonds Direct
262936432 · Oct 27
$9,102 AUD
$6,379 USD
View
9 more retailers have this diamond
Prices start from $4,412 AUDSave up to $4,690 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
$4,412 AUD