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Marquise|Natural|GIA

1.26ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 5231971694

Certificate GIA 5231971694

Diamond specifications and retailer prices

From £3,044 GBP
As of November 6, 2026
Save £3,378 GBP (53%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,423 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.26ct natural marquise diamond

This 1.26ct natural marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5231971694. Listed at 8 retailers as of November 2, 2026, with prices from £3,044 to £6,423, a £3,378 spread on the same certified stone. MOH London lists it at £6,423. 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

1.26
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231971694
Dimensions10.01 × 5.77 × 3.79 mm
L/W Ratio1.73
Culet sizeNone
Top View
10.01 mm5.77 mm1.26 ctI / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 5231971694
Side View
Table 53.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 65.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £6,423 GBP|Low: £2,971 GBP|High: £6,499 GBP|Avg: £4,165 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£3,044 GBP
Retailer 5£3,268 GBP
Retailer 4£3,280 GBP
Retailer 6£4,086 GBP
Retailer 3£4,365 GBP
Retailer 8£4,451 GBP
Retailer 2£4,538 GBP
MOH London£6,423 GBP

42 data points across 8 retailers

8 retailers£3,044 GBP to £6,423 GBP

B+
Cheapest Retailer
-
£3,044 GBP
B+
Retailer 2
-
£3,268 GBP
View
Final sale: no returns
B
Retailer 3
-
£3,280 GBP
View
Retailer 4
-
£4,086 GBP
View
Price last confirmed 34 days ago
B
Retailer 5
-
£4,365 GBP
View
Retailer 6
-
£4,451 GBP
View
Price last confirmed 23 days ago
B
Retailer 7
-
£4,538 GBP
View
Most Expensive
C
MOH London
42EA1596D · Nov 2
£6,423 GBP
View
7 more retailers have this diamond
Prices start from £3,044 GBPSave up to £3,378 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+
1.26ct Marquise
£3,044 GBP