Cushion|Natural|GIA

1.71ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2151050511

Certificate GIA 2151050511

Diamond specifications and retailer prices

From $7,375 USD
As of October 28, 2026
Save $2,863 USD (28%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $13,650 USD 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $13,650 USD|Low: $7,214 USD|High: $13,814 USD|Avg: $9,597 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4$7,375 USD
Retailer 5$7,935 USD
Retailer 6$9,226 USD
Retailer 2$9,239 USD
Retailer 7$9,790 USD
Retailer 3$10,238 USD
MOH London$13,650 USD

42 data points across 7 retailers

9 retailers$7,375 USD to $10,238 USD

B
Cheapest Retailer
-
$7,375 USD
B
Retailer 2
-
$7,935 USD
View
Final sale: no returns
B
Retailer 3
-
$9,226 USD
View
B
Retailer 4
-
$9,239 USD
£7,275 GBP
View
B
Retailer 5
-
$9,790 USD
View
B
Retailer 6
-
$9,790 USD
View
B
Retailer 7
-
$10,120 USD
View
B
Retailer 8
-
$10,238 USD
€9,750 EUR
View
Most Expensive
MOH London
B6593994D · Nov 1
$13,650 USD
£10,748 GBP
View
Price under review
8 more retailers have this diamond
Prices start from $7,375 USDSave up to $2,863 USD

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
$7,375 USD