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Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 5543768687

Certificate GIA 5543768687

Diamond specifications and retailer prices

From $3,666 USD
As of November 6, 2026
Save $3,283 USD (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,949 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5543768687. Listed at 8 retailers as of November 4, 2026, with prices from $3,666 to $6,949, a $3,283 spread on the same certified stone. MOH London lists it at $6,949. 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

1.51
Carat
K
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle37°
OriginNatural
Grading LabGIA
CertificateGIA 5543768687
Dimensions7.91 × 6.00 × 4.06 mm
L/W Ratio1.32
Top View
7.91 mm6.00 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543768687
Side View
Table 62.0%Crown 33.3°Girdle: STK-VTKPavilion 37°Culet: NoneDepth 67.7%

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 6
Current: $6,949 USD|Low: $3,666 USD|High: $7,573 USD|Avg: $4,798 USD|-8.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7$3,666 USD
Retailer 8$3,820 USD
Retailer 2$4,151 USD
Retailer 5$4,166 USD
Retailer 3$4,222 USD
Retailer 4$4,314 USD
Retailer 6$4,439 USD
MOH London$6,949 USD

44 data points across 8 retailers

8 retailers$3,666 USD to $6,949 USD

B+
Cheapest Retailer
-
$3,666 USD
B+
Retailer 2
-
$3,820 USD
View
B+
Retailer 3
-
$4,151 USD
View
Retailer 4
-
$4,166 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$4,222 USD
View
B+
Retailer 6
-
$4,314 USD
View
B
Retailer 7
-
$4,439 USD
View
Most Expensive
B
MOH London
59BF3CB5C · Nov 4
$6,949 USD
£5,472 GBP
View
7 more retailers have this diamond
Prices start from $3,666 USDSave up to $3,283 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+
1.51ct Cushion
$3,666 USD