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1.25ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 2566367099

Certificate GIA 2566367099

Diamond specifications and retailer prices

From £1,352 GBP
As of November 4, 2026
Save £520 GBP (28%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,872 GBP at Yorxs · As of November 5, 2026
View at Yorxs

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566367099. Listed at 4 retailers as of November 4, 2026, with prices from £1,352 to £1,872, a £520 spread on the same certified stone. Yorxs lists it at £1,872. 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

1.25
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2566367099
Dimensions6.86 × 6.80 × 4.30 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Indented Natural, Natural
Top View
6.86 mm6.80 mm1.25 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566367099
Side View
Table 58.0%Crown 35.5°Girdle: Med. - Sli. ThickPavilion 41.2°Culet: NDepth 62.9%

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 4
Current: £1,491 GBP|Low: £1,352 GBP|High: £2,021 GBP|Avg: £1,583 GBP|-6.7%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 6, 2026
Retailer 3£1,352 GBP
Retailer 2£1,427 GBP
Retailer 1£1,491 GBP
Yorxs£1,872 GBP

34 data points across 4 retailers

4 retailers£1,352 GBP to £1,872 GBP

B+
Cheapest Retailer
-
£1,352 GBP
B+
Retailer 2
-
£1,427 GBP
View
B+
Retailer 3
-
£1,491 GBP
View
Most Expensive
B
Yorxs
C8DDE3E99 · Nov 5
£1,872 GBP
€2,400 EUR
View
3 more retailers have this diamond
Prices start from £1,352 GBPSave up to £520 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+
1.25ct Round
£1,352 GBP