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Cushion|Natural|GIA

1.71ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2151050511

Certificate GIA 2151050511

Diamond specifications and retailer prices

From $10,523 AUD
$7,375 USD
As of October 28, 2026
Save $4,131 AUD (28%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $19,477 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.71ct natural cushion diamond

This 1.71ct natural cushion sits in the one-and-a-half to two carat band, graded J 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 2151050511. Listed at 9 retailers as of October 28, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2151050511
Dimensions6.71 × 6.65 × 4.63 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.71 mm6.65 mm1.71 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2151050511
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $19,477 AUD|Low: $10,294 AUD|High: $19,711 AUD|Avg: $13,674 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4$10,523 AUD
Retailer 5$11,322 AUD
Retailer 6$13,165 AUD
Retailer 3$13,183 AUD
Retailer 2$14,654 AUD
MOH London$19,477 AUD

42 data points across 6 retailers

9 retailers$10,523 AUD to $14,654 AUD

B
Cheapest Retailer
-
$10,523 AUD
$7,375 USD
B
Retailer 2
-
$11,322 AUD
$7,935 USD
View
Final sale: no returns
B
Retailer 3
-
$13,165 AUD
$9,226 USD
View
B
Retailer 4
-
$13,183 AUD
£7,275 GBP
View
B
Retailer 5
-
$13,969 AUD
$9,790 USD
View
B
Retailer 6
-
$13,969 AUD
$9,790 USD
View
B
Retailer 7
-
$14,440 AUD
$10,120 USD
View
B
Retailer 8
-
$14,654 AUD
€9,781 EUR
View
Most Expensive
MOH London
B6593994D · Nov 1
$19,477 AUD
£10,748 GBP
View
Price under review
8 more retailers have this diamond
Prices start from $10,523 AUDSave up to $4,131 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 Cushion
$10,523 AUD