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Marquise|Natural|GIA

1.71ct D SI2 Marquise Natural Diamond

ID • D/SI2 • GIA 02

Certificate GIA 02

Diamond specifications and retailer prices

From $16,593 AUD
$11,656 USD
As of October 31, 2026
Save $3,979 AUD (19%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $20,572 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.71ct natural marquise diamond

This 1.71ct natural marquise sits in the one-and-a-half to two carat band, graded D 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. Listed at 3 retailers as of October 31, 2026, with prices from $16,593 to $20,572, a $3,979 spread on the same certified stone. Blue Nile lists it at $20,572. 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

1.71
Carat
D
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 02
Dimensions13.41 × 6.25 × 3.65 mm
L/W Ratio2.15
Top View
13.41 mm6.25 mm1.71 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 02
Side View
Table 64.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.4%

Caratlytics Score

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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: Oct 31
Current: $20,572 AUD|Low: $16,593 AUD|High: $20,985 AUD|Avg: $18,341 AUD|-2.0%
Blue Nile
Retailer 2
Retailer 3
October 10, 2026
Retailer 3$16,593 AUD
Retailer 2$17,747 AUD
Blue Nile$20,572 AUD

4 data points across 3 retailers

3 retailers$16,593 AUD to $20,572 AUD

A
Cheapest Retailer
-
$16,593 AUD
$11,656 USD
B+
Retailer 2
-
$17,747 AUD
$12,466 USD
View
Most Expensive
B
Blue Nile
28597955 · Oct 31
$20,572 AUD
$14,451 USD
View
2 more retailers have this diamond
Prices start from $16,593 AUDSave up to $3,979 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
1.71ct Marquise
$16,593 AUD