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Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

GD • E/SI1 • GIA 6551449414

Certificate GIA 6551449414

Diamond specifications and retailer prices

From $2,959 USD
As of November 6, 2026
Save $3,688 USD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,647 USD at MOH London · As of November 2, 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 E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551449414. Listed at 15 retailers as of November 2, 2026, with prices from $2,959 to $6,647, a $3,688 spread on the same certified stone. MOH London lists it at $6,647. 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
E
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551449414
Dimensions6.21 × 6.16 × 4.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
6.21 mm6.16 mm1.51 ctE / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551449414
Side View
Table 62.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 70.9%

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: $6,647 USD|Low: $2,959 USD|High: $6,873 USD|Avg: $4,127 USD|-3.3%
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
November 6, 2026
Retailer 2$2,959 USD
Retailer 15$3,122 USD
Retailer 12$3,354 USD
Retailer 14$3,459 USD
Retailer 4$3,540 USD
Retailer 8$3,658 USD
Retailer 5$3,751 USD
Retailer 9$3,958 USD
Retailer 6$4,018 USD
Retailer 13$4,175 USD
Retailer 10$4,189 USD
Retailer 3$4,420 USD
Retailer 7$4,710 USD
Retailer 11$4,798 USD
MOH London$6,647 USD

20 data points across 15 retailers

15 retailers$2,959 USD to $6,647 USD

A
Cheapest Retailer
-
$2,959 USD
A
Retailer 2
-
$3,122 USD
View
Final sale: no returns
A
Retailer 3
-
$3,354 USD
View
A
Retailer 4
-
$3,459 USD
View
A
Retailer 5
-
$3,540 USD
View
A
Retailer 6
-
$3,658 USD
View
A
Retailer 7
-
$3,751 USD
View
A
Retailer 8
-
$3,958 USD
View
Retailer 9
-
$4,018 USD
View
Price last confirmed 8 days ago
A
Retailer 10
-
$4,175 USD
View
A
Retailer 11
-
$4,189 USD
View
A
Retailer 12
-
$4,420 USD
View
Retailer 13
-
$4,494 USD
View
Price last confirmed 33 days ago
A
Retailer 14
-
$4,798 USD
View
Most Expensive
B+
MOH London
D9EF38E03 · Nov 2
$6,647 USD
£5,234 GBP
View
14 more retailers have this diamond
Prices start from $2,959 USDSave up to $3,688 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
$2,959 USD