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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 £9,347 GBP
$12,543 USD
As of November 1, 2026
Save £6,387 GBP (41%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £15,734 GBP at MOH London · As of November 1, 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 £9,347 to £15,734, a £6,387 spread on the same certified stone. MOH London lists it at £15,734. 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

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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: £15,734 GBP|Low: £6,613 GBP|High: £15,902 GBP|Avg: £10,879 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 11
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Retailer 22
November 2, 2026
Retailer 10£6,613 GBP
Retailer 12£8,436 GBP
Retailer 9£8,851 GBP
Retailer 15£9,185 GBP
Retailer 3£9,347 GBP
Retailer 20£9,654 GBP
Retailer 18£9,896 GBP
Retailer 22£10,158 GBP
Retailer 11£10,456 GBP
Retailer 6£10,755 GBP
Retailer 13£10,759 GBP
Retailer 19£10,823 GBP
Retailer 21£11,056 GBP
Retailer 4£11,081 GBP
Retailer 8£11,081 GBP
Retailer 14£11,155 GBP
Retailer 7£11,454 GBP
Retailer 5£11,809 GBP
Retailer 2£12,691 GBP
Retailer 17£14,063 GBP
Retailer 16£14,801 GBP
MOH London£15,734 GBP

22 data points across 22 retailers

17 retailers£9,347 GBP to £15,734 GBP

B+
Cheapest Retailer
-
£9,347 GBP
$12,543 USD
B
Retailer 2
-
£9,654 GBP
$12,955 USD
View
Final sale: no returns
B
Retailer 3
-
£9,896 GBP
$13,280 USD
View
B
Retailer 4
-
£10,158 GBP
$13,632 USD
View
B
Retailer 5
-
£10,755 GBP
$14,433 USD
View
B
Retailer 6
-
£10,759 GBP
View
Retailer 7
-
£10,823 GBP
A$22,345 AUD
View
Price last confirmed 9 days ago
B
Retailer 8
-
£11,056 GBP
$14,837 USD
View
B
Retailer 9
-
£11,081 GBP
$14,870 USD
View
B
Retailer 10
-
£11,081 GBP
$14,870 USD
View
Retailer 11
-
£11,334 GBP
$15,209 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
£11,454 GBP
$15,370 USD
View
B
Retailer 13
-
£11,809 GBP
$15,847 USD
View
B
Retailer 14
-
£12,691 GBP
€16,219 EUR
View
B
Retailer 15
-
£14,063 GBP
View
B
Retailer 16
-
£14,801 GBP
ZAR 320,865 ZAR
View
Most Expensive
B
MOH London
0C76255AB · Nov 1
£15,734 GBP
View
16 more retailers have this diamond
Prices start from £9,347 GBPSave up to £6,387 GBP

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
£9,347 GBP