Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 5556305352

Certificate GIA 5556305352

Diamond specifications and retailer prices

From $2,355 USD
As of November 6, 2026
Save $2,716 USD (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,071 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5556305352. Listed at 17 retailers as of November 4, 2026, with prices from $2,355 to $5,071, a $2,716 spread on the same certified stone. MOH London lists it at $5,071. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556305352
Dimensions7.51 × 5.76 × 4.19 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.51 mm5.76 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556305352
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 72.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,071 USD|Low: $2,316 USD|High: $5,298 USD|Avg: $3,232 USD|-4.3%
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
November 6, 2026
Retailer 4$2,355 USD
Retailer 6$2,359 USD
Retailer 12$2,514 USD
Retailer 13$2,543 USD
Retailer 14$2,555 USD
Retailer 16$2,705 USD
Retailer 8$2,745 USD
Retailer 5$2,890 USD
Retailer 2$2,950 USD
Retailer 3$2,960 USD
Retailer 7$3,118 USD
Retailer 10$3,200 USD
Retailer 9$3,539 USD
Retailer 11$3,711 USD
Retailer 15$4,858 USD
MOH London$5,071 USD

24 data points across 16 retailers

17 retailers$2,355 USD to $5,071 USD

A
Cheapest Retailer
-
$2,355 USD
A
Retailer 2
-
$2,359 USD
View
A
Retailer 3
-
$2,514 USD
View
A
Retailer 4
-
$2,543 USD
View
Final sale: no returns
A
Retailer 5
-
$2,555 USD
View
A
Retailer 6
-
$2,705 USD
View
B+
Retailer 7
-
$2,745 USD
View
A
Retailer 8
-
$2,890 USD
View
A
Retailer 9
-
$2,950 USD
View
A
Retailer 10
-
$2,960 USD
View
Retailer 11
-
$3,118 USD
View
Price last confirmed 18 days ago
B+
Retailer 12
-
$3,200 USD
View
B+
Retailer 13
-
$3,287 USD
View
B+
Retailer 14
-
$3,539 USD
View
B+
Retailer 15
-
$3,711 USD
View
B
Retailer 16
-
$4,858 USD
View
Most Expensive
B
MOH London
83913B52F · Nov 4
$5,071 USD
£3,993 GBP
View
16 more retailers have this diamond
Prices start from $2,355 USDSave up to $2,716 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.

A
1.51ct Cushion
$2,355 USD