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Cushion|Natural|GIA

0.90ct K SI1 Cushion Natural Diamond

GD • K/SI1 • GIA 5543153205

Certificate GIA 5543153205

Diamond specifications and retailer prices

From £422 GBP
As of November 6, 2026
Save £146 GBP (26%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £568 GBP at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5543153205. Listed at 5 retailers as of November 5, 2026, with prices from £422 to £568, a £146 spread on the same certified stone. 77 Diamonds lists it at £568. 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

0.90
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5543153205
Dimensions5.36 × 5.34 × 3.61 mm
L/W Ratio1.00
Top View
5.36 mm5.34 mm0.90 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543153205
Side View
Table 65.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.6%

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: £568 GBP|Low: £379 GBP|High: £600 GBP|Avg: £498 GBP|-0.6%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 7£399 GBP
Retailer 5£422 GBP
Retailer 2£433 GBP
Retailer 4£520 GBP
Retailer 3£540 GBP
Retailer 6£566 GBP
77 Diamonds£568 GBP

40 data points across 7 retailers

5 retailers£422 GBP to £568 GBP

A
Cheapest Retailer
-
£422 GBP
Final sale: no returns
A
Retailer 2
-
£433 GBP
View
B+
Retailer 3
-
£520 GBP
View
B+
Retailer 4
-
£540 GBP
View
Most Expensive
B+
77 Diamonds
CUSCPYUQHYWCJ · Nov 5
£568 GBP
View
4 more retailers have this diamond
Prices start from £422 GBPSave up to £146 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
0.90ct Cushion
£422 GBP