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Marquise|Natural|GIA

1.51ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 6541161911

Certificate GIA 6541161911

Diamond specifications and retailer prices

From $17,094 AUD
$11,980 USD
As of November 1, 2026
Save $4,695 AUD (22%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $21,789 AUD at Jared · As of November 2, 2026
View at Jared

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541161911. Listed at 6 retailers as of November 1, 2026, with prices from $17,094 to $21,789, a $4,695 spread on the same certified stone. Jared lists it at $21,789. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.62°
Pavilion angle41.26°
OriginNatural
Grading LabGIA
CertificateGIA 6541161911
Dimensions11.26 × 5.97 × 3.79 mm
L/W Ratio1.89
Top View
11.26 mm5.97 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541161911
Side View
Table 65.0%Crown 37.62°Girdle: ThickPavilion 41.26°Culet: NoneDepth 63.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $21,206 AUD|Low: $16,177 AUD|High: $21,344 AUD|Avg: $19,262 AUD|+1.8%
Retailer 1
Retailer 2
October 31, 2026
Retailer 2$17,795 AUD
Retailer 1$21,206 AUD

36 data points across 2 retailers

6 retailers$17,094 AUD to $21,789 AUD

B+
Cheapest Retailer
-
$17,094 AUD
$11,980 USD
B+
Retailer 2
-
$17,795 AUD
$12,471 USD
View
Final sale: no returns
B
Retailer 3
-
$21,090 AUD
$14,780 USD
View
B
Retailer 4
-
$21,090 AUD
$14,780 USD
View
B
Retailer 5
-
$21,206 AUD
£11,702 GBP
View
Most Expensive
B
Jared
157862417 · Nov 2
$21,789 AUD
$15,270 USD
View
5 more retailers have this diamond
Prices start from $17,094 AUDSave up to $4,695 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.

B+
1.51ct Marquise
$17,094 AUD