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Cushion|Natural|GIA

1.23ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 1563185383

Certificate GIA 1563185383

Diamond specifications and retailer prices

From £1,607 GBP
As of November 6, 2026
Save £1,436 GBP (47%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £3,043 GBP at MOH London · As of November 4, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1563185383. Listed at 4 retailers as of November 4, 2026, with prices from £1,607 to £3,043, a £1,436 spread on the same certified stone. MOH London lists it at £3,043. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1563185383
Dimensions5.95 × 5.95 × 4.10 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather, Needle, Cloud
Top View
5.95 mm5.95 mm1.23 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1563185383
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.0%

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: £3,043 GBP|Low: £1,434 GBP|High: £3,346 GBP|Avg: £2,152 GBP|-9.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2£1,607 GBP
Retailer 4£1,739 GBP
Retailer 3£2,161 GBP
MOH London£3,043 GBP

39 data points across 4 retailers

4 retailers£1,607 GBP to £3,043 GBP

A
Cheapest Retailer
-
£1,607 GBP
Final sale: no returns
B+
Retailer 2
-
£1,739 GBP
View
B+
Retailer 3
-
£2,161 GBP
View
Most Expensive
B
MOH London
5B43DE25D · Nov 4
£3,043 GBP
View
3 more retailers have this diamond
Prices start from £1,607 GBPSave up to £1,436 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
1.23ct Cushion
£1,607 GBP