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Round|Natural|GIA

1.25ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1548168345

Certificate GIA 1548168345

Diamond specifications and retailer prices

From £888 GBP
As of November 4, 2026
Save £1,813 GBP (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,701 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1548168345. Listed at 12 retailers as of November 4, 2026, with prices from £888 to £2,701, a £1,813 spread on the same certified stone. NZ Jewellers lists it at £2,701. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1548168345
Dimensions6.81 × 6.86 × 4.27 mm
L/W Ratio1.01
Cert comments
Additional twinning wisps, pinpoints, internal graining and surface graining are not shown.
Key to symbols
Twinning Wisp, Crystal
Top View
6.81 mm6.86 mm1.25 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1548168345
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.4%

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: Nov 4
Current: £2,701 GBP|Low: £888 GBP|High: £4,185 GBP|Avg: £1,677 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 9£888 GBP
Retailer 12£929 GBP
Retailer 4£1,003 GBP
Retailer 13£1,003 GBP
Retailer 3£1,049 GBP
Retailer 11£1,064 GBP
Retailer 14£1,085 GBP
Retailer 2£1,088 GBP
Retailer 10£1,158 GBP
Retailer 8£1,351 GBP
Retailer 7£1,530 GBP
Retailer 6£1,788 GBP
NZ Jewellers£2,701 GBP
Retailer 5£4,185 GBP

19 data points across 14 retailers

12 retailers£888 GBP to £2,701 GBP

A
Cheapest Retailer
-
£888 GBP
A
Retailer 2
-
£929 GBP
View
Retailer 3
-
£1,003 GBP
View
Price last confirmed 8 days ago
A
Retailer 4
-
£1,003 GBP
View
A
Retailer 5
-
£1,049 GBP
View
A
Retailer 6
-
£1,064 GBP
View
B+
Retailer 7
-
£1,085 GBP
View
A
Retailer 8
-
£1,088 GBP
View
B+
Retailer 9
-
£1,158 GBP
View
B+
Retailer 10
-
£1,351 GBP
View
B+
Retailer 11
-
£1,530 GBP
View
Most Expensive
C
NZ Jewellers
da9be6db-bdfb-48aa-a6fa-94ccf466ae26 · Nov 5
£2,701 GBP
$3,635 USD
View
11 more retailers have this diamond
Prices start from £888 GBPSave up to £1,813 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
1.25ct Round
£888 GBP