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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 $6,528 NZD
As of November 6, 2026
Save $2,381 NZD (27%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $8,909 NZD 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 $6,528 to $8,909, a $2,381 spread on the same certified stone. Blue Nile lists it at $8,909. 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
Colour
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: $8,909 NZD|Low: $6,465 NZD|High: $8,938 NZD|Avg: $7,591 NZD|-0.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$6,528 NZD
Retailer 3$6,534 NZD
Retailer 2$6,563 NZD
Retailer 5$7,896 NZD
Retailer 4$8,303 NZD
Retailer 7$8,650 NZD
Blue Nile$8,909 NZD

44 data points across 7 retailers

7 retailers$6,528 NZD to $8,909 NZD

A
Cheapest Retailer
-
$6,528 NZD
Final sale: no returns
A
Retailer 2
-
$6,534 NZD
View
A
Retailer 3
-
$6,563 NZD
View
A
Retailer 4
-
$7,896 NZD
View
Retailer 5
-
$8,303 NZD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
$8,650 NZD
View
Most Expensive
B+
Blue Nile
30380890 · Oct 31
$8,909 NZD
$4,939 USD
View
6 more retailers have this diamond
Prices start from $6,528 NZDSave up to $2,381 NZD

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
$6,528 NZD