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Cushion|Natural|GIA

3.00ct D SI1 Cushion Natural Diamond

GD • D/SI1 • GIA 3555413575

Certificate GIA 3555413575

Diamond specifications and retailer prices

From £17,232 GBP
As of November 6, 2026
Save £3,391 GBP (16%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £20,623 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 D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 3555413575. Listed at 2 retailers as of November 5, 2026, with prices from £17,232 to £20,623, a £3,391 spread on the same certified stone. Blue Nile lists it at £20,623. 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
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle38.3°
Pavilion angle57°
OriginNatural
Grading LabGIA
CertificateGIA 3555413575
Dimensions9.17 × 7.64 × 5.34 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
9.17 mm7.64 mm3.00 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 3555413575
Side View
Table 61.0%Crown 38.3°Girdle: THK-ETKPavilion 57°Culet: NoneDepth 69.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £20,623 GBP|Low: £17,232 GBP|High: £21,755 GBP|Avg: £19,600 GBP|-5.2%
Blue Nile
Retailer 2
November 6, 2026
Retailer 2£17,232 GBP
Blue Nile£20,623 GBP

38 data points across 2 retailers

2 retailers£17,232 GBP to £20,623 GBP

A
Cheapest Retailer
-
£17,232 GBP
Most Expensive
B+
Blue Nile
29322343 · Nov 5
£20,623 GBP
$27,604 USD
View
1 more retailer has this diamond
Prices start from £17,232 GBPSave up to £3,391 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
£17,232 GBP