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1.25ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 3555658587

Certificate GIA 3555658587

Diamond specifications and retailer prices

From £1,299 GBP
$1,740 USD
As of November 1, 2026
Save £1,167 GBP (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,465 GBP at MOH London · As of October 29, 2026
View at MOH London

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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555658587. Listed at 7 retailers as of October 29, 2026, with prices from £1,299 to £2,465, a £1,167 spread on the same certified stone. MOH London lists it at £2,465. 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3555658587
Dimensions6.86 × 6.89 × 4.23 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
6.86 mm6.89 mm1.25 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555658587
Side View
Table 60.0%Crown 35.5°Girdle: Sli. ThickPavilion 40.8°Culet: NoneDepth 61.5%

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 1
Current: £2,465 GBP|Low: £1,299 GBP|High: £2,683 GBP|Avg: £1,700 GBP|-6.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5£1,299 GBP
Retailer 4£1,405 GBP
Retailer 7£1,475 GBP
Retailer 8£1,485 GBP
Retailer 3£1,526 GBP
Retailer 6£1,534 GBP
Retailer 2£1,903 GBP
MOH London£2,465 GBP

41 data points across 8 retailers

7 retailers£1,299 GBP to £2,465 GBP

A
Cheapest Retailer
-
£1,299 GBP
$1,740 USD
A
Retailer 2
-
£1,405 GBP
$1,882 USD
View
A
Retailer 3
-
£1,475 GBP
$1,976 USD
View
A
Retailer 4
-
£1,526 GBP
View
A
Retailer 5
-
£1,534 GBP
$2,056 USD
View
B+
Retailer 6
-
£1,903 GBP
€2,429 EUR
View
Most Expensive
B
MOH London
75CC8F013 · Oct 29
£2,465 GBP
View
6 more retailers have this diamond
Prices start from £1,299 GBPSave up to £1,167 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
£1,299 GBP