CaratHunter
Plans
Round|Natural|GIA

1.26ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 4

Certificate GIA 4

Diamond specifications and retailer prices

From £2,820 GBP
$3,778 USD
As of October 30, 2026
Save £713 GBP (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £3,532 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of October 30, 2026, with prices from £2,820 to £3,532, a £713 spread on the same certified stone. Blue Nile lists it at £3,532. 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

1.26
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 4
Dimensions6.89 × 6.93 × 4.29 mm
L/W Ratio1.01
Top View
6.89 mm6.93 mm1.26 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 4
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.1%

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: Oct 30
Current: £3,532 GBP|Low: £2,820 GBP|High: £3,532 GBP|Avg: £3,013 GBP
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 2£2,820 GBP
Retailer 3£2,947 GBP
Blue Nile£3,532 GBP

2 data points across 3 retailers

3 retailers£2,820 GBP to £3,532 GBP

A
Cheapest Retailer
-
£2,820 GBP
$3,778 USD
A
Retailer 2
-
£2,947 GBP
$3,948 USD
View
Most Expensive
B+
Blue Nile
22390073 · Oct 31
£3,532 GBP
$4,733 USD
View
2 more retailers have this diamond
Prices start from £2,820 GBPSave up to £713 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
1.26ct Round
£2,820 GBP