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Cushion|Natural|GIA

1.09ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2106631020

Certificate GIA 2106631020

Diamond specifications and retailer prices

From £1,499 GBP
As of November 6, 2026
Save £867 GBP (37%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,366 GBP at MOH London · As of November 2, 2026
View at MOH London

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 2106631020. Listed at 4 retailers as of November 2, 2026, with prices from £1,499 to £2,366, a £867 spread on the same certified stone. MOH London lists it at £2,366. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2106631020
Dimensions6.42 × 5.43 × 3.81 mm
L/W Ratio1.18
Girdle conditionFaceted
Key to symbols
Crystal, Feather
Top View
6.42 mm5.43 mm1.09 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceStrong
CertificateGIA 2106631020
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 70.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,366 GBP|Low: £1,210 GBP|High: £2,396 GBP|Avg: £1,844 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£1,263 GBP
Retailer 3£1,499 GBP
Retailer 2£1,718 GBP
MOH London£2,366 GBP
Retailer 5£2,396 GBP

40 data points across 5 retailers

4 retailers£1,499 GBP to £2,366 GBP

Retailer 1
-
£1,263 GBP
Price last confirmed 16 days ago
B
Retailer 2
-
£1,499 GBP
View
B
Retailer 3
-
£1,718 GBP
View
Most Expensive
C
MOH London
7093200C7 · Nov 2
£2,366 GBP
View
3 more retailers have this diamond
Prices start from £1,499 GBPSave up to £867 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.

B
1.09ct Cushion
£1,499 GBP