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Cushion|Natural|GIA

3.00ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 2557425872

Certificate GIA 2557425872

Diamond specifications and retailer prices

From £18,016 GBP
As of November 6, 2026
Save £3,339 GBP (16%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £21,355 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 3ct natural cushion diamond

This 3ct natural cushion sits in the three to five 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 2557425872. Listed at 3 retailers as of November 5, 2026, with prices from £18,016 to £21,355, a £3,339 spread on the same certified stone. Blue Nile lists it at £21,355. 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

3.00
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle30.1°
Pavilion angle54.3°
OriginNatural
Grading LabGIA
CertificateGIA 2557425872
Dimensions8.44 × 8.28 × 5.61 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Indented Natural, Natural
Top View
8.44 mm8.28 mm3.00 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557425872
Side View
Table 70.0%Crown 30.1°Girdle: STK-VTKPavilion 54.3°Culet: NoneDepth 67.7%

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: £21,355 GBP|Low: £18,016 GBP|High: £22,185 GBP|Avg: £20,310 GBP|-3.7%
Blue Nile
Retailer 2
Retailer 3
November 6, 2026
Retailer 2£18,016 GBP
Retailer 3£19,622 GBP
Blue Nile£21,355 GBP

29 data points across 3 retailers

3 retailers£18,016 GBP to £21,355 GBP

A
Cheapest Retailer
-
£18,016 GBP
A
Retailer 2
-
£19,622 GBP
View
Most Expensive
A
Blue Nile
29347762 · Nov 5
£21,355 GBP
$28,583 USD
View
2 more retailers have this diamond
Prices start from £18,016 GBPSave up to £3,339 GBP

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
3.00ct Cushion
£18,016 GBP