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Marquise|Natural|GIA

1.23ct F SI1 Marquise Natural Diamond

GD • F/SI1 • GIA 2125061627

Certificate GIA 2125061627

Diamond specifications and retailer prices

From £6,293 GBP
As of November 7, 2026
Save £1,121 GBP (15%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £9,471 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural marquise diamond

This 1.23ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2125061627. Listed at 5 retailers as of November 3, 2026, with a relatively tight 18% 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
F
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2125061627
Dimensions11.28 × 5.26 × 3.67 mm
L/W Ratio2.14
Top View
11.28 mm5.26 mm1.23 ctF / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceMedium
CertificateGIA 2125061627
Side View
Table 50.0%CrownGirdlePavilionCuletDepth 69.8%

Caratlytics Score

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

Price History

Last verified: Nov 7
Current: £9,471 GBP|Low: £6,293 GBP|High: £9,611 GBP|Avg: £7,463 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 2£6,293 GBP
Retailer 4£6,420 GBP
Retailer 3£7,414 GBP
Retailer 5£7,503 GBP
MOH London£9,471 GBP

46 data points across 5 retailers

5 retailers£6,293 GBP to £7,414 GBP

B
Cheapest Retailer
-
£6,293 GBP
Retailer 2
-
£6,420 GBP
View
Price last confirmed 15 days ago
C
Retailer 3
-
£7,414 GBP
View
Retailer 4
-
£7,503 GBP
View
Price last confirmed 15 days ago
Most Expensive
MOH London
8447EB51D · Nov 4
£9,471 GBP
View
Price under review
4 more retailers have this diamond
Prices start from £6,293 GBPSave up to £1,121 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
1.23ct Marquise
£6,293 GBP