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Cushion|Natural|GIA

1.09ct K SI1 Cushion Natural Diamond

GD • K/SI1 • GIA 7568248235

Certificate GIA 7568248235

Diamond specifications and retailer prices

From £803 GBP
As of November 6, 2026
Save £177 GBP (18%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £980 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.09ct natural cushion diamond

This 1.09ct natural cushion sits in the classic 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 7568248235. Listed at 6 retailers as of November 5, 2026, with prices from £803 to £980, a £177 spread on the same certified stone. Blue Nile lists it at £980. 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

1.09
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7568248235
Dimensions5.77 × 5.67 × 3.83 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
5.77 mm5.67 mm1.09 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7568248235
Side View
Table 64.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

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: £980 GBP|Low: £702 GBP|High: £1,028 GBP|Avg: £873 GBP|-4.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3£799 GBP
Retailer 6£803 GBP
Retailer 4£836 GBP
Retailer 2£885 GBP
Retailer 5£909 GBP
Blue Nile£980 GBP

41 data points across 6 retailers

6 retailers£803 GBP to £980 GBP

Retailer 1
-
£799 GBP
Price last confirmed 16 days ago
A
Retailer 2
-
£803 GBP
View
Final sale: no returns
B+
Retailer 3
-
£836 GBP
View
B+
Retailer 4
-
£885 GBP
View
B+
Retailer 5
-
£909 GBP
View
Most Expensive
B+
Blue Nile
30161417 · Nov 5
£980 GBP
$1,312 USD
View
5 more retailers have this diamond
Prices start from £803 GBPSave up to £177 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
1.09ct Cushion
£803 GBP