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Round|Natural|GIA

1.26ct M SI2 Round Natural Diamond

VG • M/SI2 • GIA 2126736125

Certificate GIA 2126736125

Diamond specifications and retailer prices

From £1,690 GBP
As of November 6, 2026
Save £1,857 GBP (52%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,547 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 2126736125. Listed at 10 retailers as of November 5, 2026, with prices from £1,690 to £3,547, a £1,857 spread on the same certified stone. NZ Jewellers lists it at £3,547. 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
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2126736125
Dimensions6.80 × 6.85 × 4.33 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather
Top View
6.80 mm6.85 mm1.26 ctM / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2126736125
Side View
Table 56.0%Crown 36°Girdle: MED-THKPavilion 41°Culet: NoneDepth 63.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £1,690 GBP|Low: £1,690 GBP|High: £2,178 GBP|Avg: £1,886 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 1£1,690 GBP
Retailer 3£1,697 GBP
Retailer 4£1,800 GBP
Retailer 5£2,045 GBP
Retailer 2£2,165 GBP

37 data points across 5 retailers

10 retailers£1,690 GBP to £3,547 GBP

B+
Cheapest Retailer
-
£1,690 GBP
Retailer 2
-
£1,697 GBP
View
Price last confirmed 39 days ago
Retailer 3
-
£1,697 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£1,775 GBP
View
Price last confirmed 38 days ago
B
Retailer 5
-
£1,800 GBP
View
Retailer 6
-
£1,958 GBP
View
Price last confirmed 38 days ago
B
Retailer 7
-
£1,958 GBP
View
B
Retailer 8
-
£2,165 GBP
View
Retailer 9
-
£3,547 GBP
View
Price last confirmed 39 days ago
Most Expensive
C
NZ Jewellers
3acf3e4a-f329-4bde-af40-e469c91ac397 · Nov 5
£3,547 GBP
$4,774 USD
View
9 more retailers have this diamond
Prices start from £1,690 GBPSave up to £1,857 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 Round
£1,690 GBP