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Round|Natural|GIA

1.25ct K I1 Round Natural Diamond

EX • K/I1 • GIA 1555077138

Certificate GIA 1555077138

Diamond specifications and retailer prices

From £1,174 GBP
As of November 4, 2026
Save £1,968 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,142 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 K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 1555077138. Listed at 7 retailers as of November 4, 2026, with prices from £1,174 to £3,142, a £1,968 spread on the same certified stone. NZ Jewellers lists it at £3,142. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555077138
Dimensions6.81 × 6.87 × 4.28 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle, Indented Natural
Top View
6.81 mm6.87 mm1.25 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555077138
Side View
Table 58.0%Crown 36°GirdlePavilion 40.8°Culet: NoneDepth 62.6%

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: £3,142 GBP|Low: £1,174 GBP|High: £3,403 GBP|Avg: £1,736 GBP|-6.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 6£1,174 GBP
Retailer 3£1,288 GBP
Retailer 5£1,288 GBP
Retailer 4£1,348 GBP
Retailer 7£1,487 GBP
Retailer 8£1,691 GBP
Retailer 2£1,749 GBP
NZ Jewellers£3,142 GBP

35 data points across 8 retailers

7 retailers£1,174 GBP to £3,142 GBP

A
Cheapest Retailer
-
£1,174 GBP
A
Retailer 2
-
£1,288 GBP
View
Retailer 3
-
£1,288 GBP
View
Price last confirmed 8 days ago
A
Retailer 4
-
£1,348 GBP
View
B+
Retailer 5
-
£1,487 GBP
View
B+
Retailer 6
-
£1,749 GBP
View
Most Expensive
B
NZ Jewellers
9108a912-095e-4554-9121-00f206802627 · Nov 5
£3,142 GBP
$4,229 USD
View
6 more retailers have this diamond
Prices start from £1,174 GBPSave up to £1,968 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
£1,174 GBP