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Cushion|Natural|HRD

1.23ct J SI1 Cushion Natural Diamond

GD • J/SI1 • HRD 170001410009

Shape and cutting style on the report: Cushion

Certificate HRD 170001410009

Diamond specifications and retailer prices

From £3,641 GBP
As of November 1, 2026
Save £203 GBP (5%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £5,757 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.23ct natural cushion diamond

This 1.23ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by HRD 170001410009. Listed at 3 retailers as of October 31, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.23
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabHRD
CertificateHRD 170001410009
Dimensions7.58 × 6.51 × 3.07 mm
L/W Ratio1.16
Girdle conditionFaceted
Top View
7.58 mm6.51 mm1.23 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 170001410009
Side View
Table 67.0%CrownGirdle: MediumPavilionCulet: 3.1Depth 47.0%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 1
Current: £5,757 GBP|Low: £3,442 GBP|High: £5,826 GBP|Avg: £4,158 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 4£3,442 GBP
Retailer 2£3,641 GBP
Retailer 3£3,844 GBP
MOH London£5,757 GBP

38 data points across 4 retailers

3 retailers£3,641 GBP to £3,844 GBP

C
Cheapest Retailer
-
£3,641 GBP
C
Retailer 2
-
£3,844 GBP
€4,905 EUR
View
Most Expensive
MOH London
A539A7539 · Nov 1
£5,757 GBP
View
Price under review
2 more retailers have this diamond
Prices start from £3,641 GBPSave up to £203 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.

C
1.23ct Cushion
£3,641 GBP