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Marquise|Natural|GIA

1.51ct M SI1 Marquise Natural Diamond

EX • M/SI1 • GIA 2557581854

Certificate GIA 2557581854

Diamond specifications and retailer prices

From $2,531 AUD
As of November 6, 2026
Save $1,700 AUD (40%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,231 AUD at Wholesale Diamonds Direct · As of November 6, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557581854. Listed at 4 retailers as of November 6, 2026, with prices from $2,531 to $4,231, a $1,700 spread on the same certified stone. Wholesale Diamonds Direct lists it at $4,231. 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
M
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle38.47°
Pavilion angle40.92°
OriginNatural
Grading LabGIA
CertificateGIA 2557581854
Dimensions11.96 × 5.86 × 3.67 mm
L/W Ratio2.04
Culet sizeNone
Top View
11.96 mm5.86 mm1.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2557581854
Side View
Table 59.0%Crown 38.47°Girdle: MED-THKPavilion 40.92°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,531 AUD|Low: $2,150 AUD|High: $4,923 AUD|Avg: $3,536 AUD|-14.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Wholesale Diamonds Direct
November 6, 2026
Retailer 6$2,150 AUD
Retailer 1$2,531 AUD
Retailer 2$3,294 AUD
Retailer 5$3,330 AUD
Retailer 3$4,017 AUD
Retailer 4$4,210 AUD
Wholesale Diamonds Direct$4,231 AUD

26 data points across 7 retailers

4 retailers$2,531 AUD to $4,231 AUD

A
Cheapest Retailer
-
$2,531 AUD
B+
Retailer 2
-
$3,294 AUD
View
B+
Retailer 3
-
$3,330 AUD
View
Most Expensive
B+
Wholesale Diamonds Direct
319435365 · Nov 6
$4,231 AUD
$2,907 USD
View
3 more retailers have this diamond
Prices start from $2,531 AUDSave up to $1,700 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
$2,531 AUD