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Cushion|Natural|GIA

1.23ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 1543953806

Certificate GIA 1543953806

Diamond specifications and retailer prices

From £1,730 GBP
As of November 6, 2026
Save £2,063 GBP (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,474 GBP at Queensmith · As of October 28, 2026
View at Queensmith

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 1543953806. Listed at 14 retailers as of November 4, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1543953806
Dimensions8.13 × 5.31 × 3.52 mm
L/W Ratio1.53
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
8.13 mm5.31 mm1.23 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1543953806
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.3%

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: £4,474 GBP|Low: £1,730 GBP|High: £4,488 GBP|Avg: £2,579 GBP|+2.5%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11£1,730 GBP
Retailer 2£1,798 GBP
Retailer 8£2,055 GBP
Retailer 3£2,099 GBP
Retailer 4£2,295 GBP
Retailer 12£2,380 GBP
Retailer 7£2,393 GBP
Retailer 6£2,406 GBP
Retailer 10£2,458 GBP
Retailer 5£2,647 GBP
Retailer 9£3,793 GBP
Queensmith£4,474 GBP

31 data points across 12 retailers

14 retailers£1,730 GBP to £3,793 GBP

A
Cheapest Retailer
-
£1,730 GBP
A
Retailer 2
-
£1,798 GBP
View
B+
Retailer 3
-
£2,055 GBP
View
B+
Retailer 4
-
£2,099 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,162 GBP
View
Retailer 6
-
£2,295 GBP
View
Price last confirmed 9 days ago
B
Retailer 7
-
£2,329 GBP
View
B+
Retailer 8
-
£2,380 GBP
View
B+
Retailer 9
-
£2,393 GBP
View
B
Retailer 10
-
£2,406 GBP
View
B+
Retailer 11
-
£2,458 GBP
View
B+
Retailer 12
-
£2,647 GBP
View
B
Retailer 13
-
£3,793 GBP
View
Most Expensive
Queensmith
1543953806 · Oct 28
£4,474 GBP
View
Price last confirmed 9 days ago
13 more retailers have this diamond
Prices start from £1,730 GBPSave up to £2,063 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
£1,730 GBP