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Marquise|Natural|GIA

1.71ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2557313720

Certificate GIA 2557313720

Diamond specifications and retailer prices

From $17,898 AUD
$12,543 USD
As of November 1, 2026
Save $12,230 AUD (41%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $30,127 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.71ct natural marquise diamond

This 1.71ct natural marquise sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557313720. Listed at 17 retailers as of November 1, 2026, with prices from $17,898 to $30,127, a $12,230 spread on the same certified stone. MOH London lists it at $30,127. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.82°
Pavilion angle38.37°
OriginNatural
Grading LabGIA
CertificateGIA 2557313720
Dimensions11.66 × 6.16 × 3.86 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.66 mm6.16 mm1.71 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557313720
Side View
Table 58.0%Crown 39.82°Girdle: MED-THKPavilion 38.37°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $30,127 AUD|Low: $12,663 AUD|High: $30,450 AUD|Avg: $20,832 AUD|-1.1%
MOH London
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 2, 2026
Retailer 10$12,663 AUD
Retailer 12$16,153 AUD
Retailer 9$16,947 AUD
Retailer 15$17,588 AUD
Retailer 3$17,898 AUD
Retailer 20$18,485 AUD
Retailer 18$18,949 AUD
Retailer 22$19,452 AUD
Retailer 11$20,021 AUD
Retailer 6$20,594 AUD
Retailer 13$20,601 AUD
Retailer 19$20,725 AUD
Retailer 21$21,171 AUD
Retailer 4$21,218 AUD
Retailer 8$21,218 AUD
Retailer 14$21,359 AUD
Retailer 7$21,931 AUD
Retailer 5$22,612 AUD
Retailer 2$24,300 AUD
Retailer 17$26,929 AUD
Retailer 16$28,340 AUD
MOH London$30,127 AUD

22 data points across 22 retailers

17 retailers$17,898 AUD to $30,127 AUD

B+
Cheapest Retailer
-
$17,898 AUD
$12,543 USD
B
Retailer 2
-
$18,485 AUD
$12,955 USD
View
Final sale: no returns
B
Retailer 3
-
$18,949 AUD
$13,280 USD
View
B
Retailer 4
-
$19,452 AUD
$13,632 USD
View
B
Retailer 5
-
$20,594 AUD
$14,433 USD
View
B
Retailer 6
-
$20,601 AUD
£11,368 GBP
View
Retailer 7
-
$20,725 AUD
View
Price last confirmed 10 days ago
B
Retailer 8
-
$21,171 AUD
$14,837 USD
View
B
Retailer 9
-
$21,218 AUD
$14,870 USD
View
B
Retailer 10
-
$21,218 AUD
$14,870 USD
View
Retailer 11
-
$21,702 AUD
$15,209 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
$21,931 AUD
$15,370 USD
View
B
Retailer 13
-
$22,612 AUD
$15,847 USD
View
B
Retailer 14
-
$24,300 AUD
€16,219 EUR
View
B
Retailer 15
-
$26,929 AUD
£14,860 GBP
View
B
Retailer 16
-
$28,340 AUD
ZAR 320,865 ZAR
View
Most Expensive
B
MOH London
0C76255AB · Nov 2
$30,127 AUD
£16,625 GBP
View
16 more retailers have this diamond
Prices start from $17,898 AUDSave up to $12,230 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+
1.71ct Marquise
$17,898 AUD