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Round|Natural|GIA

1.25ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2418689032

Certificate GIA 2418689032

Diamond specifications and retailer prices

From £2,134 GBP
$2,859 USD
As of October 30, 2026
Save £2,448 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,582 GBP at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2418689032. Listed at 15 retailers as of October 30, 2026, with prices from £2,134 to £4,582, a £2,448 spread on the same certified stone. NZ Jewellers lists it at £4,582. 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°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2418689032
Dimensions6.90 × 6.85 × 4.23 mm
L/W Ratio1.01
Top View
6.90 mm6.85 mm1.25 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2418689032
Side View
Table 61.0%Crown 35°Girdle: THN-STKPavilion 41°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £4,582 GBP|Low: £1,833 GBP|High: £4,582 GBP|Avg: £2,938 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6£2,134 GBP
Retailer 7£2,199 GBP
Retailer 9£2,382 GBP
Retailer 11£2,382 GBP
Retailer 8£2,474 GBP
Retailer 5£2,732 GBP
Retailer 10£2,749 GBP
Retailer 2£2,828 GBP
Retailer 3£2,979 GBP
Retailer 4£4,398 GBP
NZ Jewellers£4,582 GBP

40 data points across 11 retailers

15 retailers£2,134 GBP to £4,582 GBP

B+
Cheapest Retailer
-
£2,134 GBP
$2,859 USD
B+
Retailer 2
-
£2,199 GBP
$2,947 USD
View
Final sale: no returns
B+
Retailer 3
-
£2,237 GBP
$2,998 USD
View
B
Retailer 4
-
£2,382 GBP
$3,192 USD
View
B
Retailer 5
-
£2,382 GBP
$3,192 USD
View
B
Retailer 6
-
£2,436 GBP
CA$4,533 CAD
View
B
Retailer 7
-
£2,474 GBP
$3,315 USD
View
B+
Retailer 8
-
£2,589 GBP
$3,469 USD
View
B+
Retailer 9
-
£2,732 GBP
View
B
Retailer 10
-
£2,749 GBP
$3,684 USD
View
B
Retailer 11
-
£2,828 GBP
€3,609 EUR
View
Retailer 12
-
£2,979 GBP
$3,992 USD
View
Price last confirmed 9 days ago
B
Retailer 13
-
£3,028 GBP
$4,057 USD
View
B
Retailer 14
-
£4,398 GBP
View
Most Expensive
B
NZ Jewellers
433753fe-0b77-4813-a979-c272d9e7e061 · Oct 30
£4,582 GBP
$6,139 USD
View
14 more retailers have this diamond
Prices start from £2,134 GBPSave up to £2,448 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
£2,134 GBP