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1.26ct M SI1 Round Natural Diamond

GD • M/SI1 • GIA 1236256134

Certificate GIA 1236256134

Diamond specifications and retailer prices

From £2,677 GBP
As of November 4, 2026
2 retailers carry this diamond
Most expensive: £3,781 GBP at Yorxs · As of November 6, 2026
View at Yorxs

About this 1.26ct natural round diamond

This 1.26ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade and certified by GIA 1236256134. Listed at 2 retailers as of November 4, 2026. 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
M
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1236256134
Dimensions7.07 × 7.13 × 4.18 mm
L/W Ratio1.01
Top View
7.07 mm7.13 mm1.26 ctM / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1236256134
Side View
Table 55.0%CrownGirdle: VTN-MEDPavilionCuletDepth 58.8%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 4
Current: £2,677 GBP|Low: £2,677 GBP|High: £3,802 GBP|Avg: £3,095 GBP
Retailer 1
Retailer 2
Yorxs
November 6, 2026
Retailer 1£2,677 GBP
Retailer 2£2,889 GBP
Yorxs£3,781 GBP

13 data points across 3 retailers

2 retailers

C
Cheapest Retailer
-
£2,677 GBP
Most Expensive
Yorxs
RD01775 · Nov 6
£3,781 GBP
€4,847 EUR
View
Price under review
1 more retailer has this diamond
Prices start from £2,677 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
1.26ct Round
£2,677 GBP