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Cushion|Natural|GIA

1.31ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 2558438430

Certificate GIA 2558438430

Diamond specifications and retailer prices

From $3,619 USD
As of November 6, 2026
Save $1,320 USD (27%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,939 USD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.31ct natural cushion diamond

This 1.31ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2558438430. Listed at 7 retailers as of October 31, 2026, with prices from $3,619 to $4,939, a $1,320 spread on the same certified stone. Blue Nile lists it at $4,939. 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

1.31
Carat
E
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558438430
Dimensions8.15 × 5.49 × 3.59 mm
L/W Ratio1.48
Top View
8.15 mm5.49 mm1.31 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558438430
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 65.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $4,939 USD|Low: $3,584 USD|High: $4,955 USD|Avg: $4,208 USD|-0.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$3,619 USD
Retailer 3$3,622 USD
Retailer 2$3,638 USD
Retailer 5$4,377 USD
Retailer 4$4,603 USD
Retailer 7$4,795 USD
Blue Nile$4,939 USD

44 data points across 7 retailers

7 retailers$3,619 USD to $4,939 USD

A
Cheapest Retailer
-
$3,619 USD
Final sale: no returns
A
Retailer 2
-
$3,622 USD
View
A
Retailer 3
-
$3,638 USD
View
A
Retailer 4
-
$4,377 USD
View
Retailer 5
-
$4,603 USD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
$4,795 USD
View
Most Expensive
B+
Blue Nile
30380890 · Oct 31
$4,939 USD
View
6 more retailers have this diamond
Prices start from $3,619 USDSave up to $1,320 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
1.31ct Cushion
$3,619 USD