Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2546459773

Certificate GIA 2546459773

Diamond specifications and retailer prices

From £2,081 GBP
As of November 4, 2026
Save £1,103 GBP (35%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,720 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2546459773. Listed at 19 retailers as of November 4, 2026, with a 53% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2546459773
Dimensions6.75 × 6.79 × 4.21 mm
L/W Ratio1.01
Top View
6.75 mm6.79 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2546459773
Side View
Table 60.0%Crown 34°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.2%

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: Nov 4
Current: £3,145 GBP|Low: £2,078 GBP|High: £4,585 GBP|Avg: £2,980 GBP|+14.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£2,105 GBP
Retailer 3£2,153 GBP
Retailer 8£2,455 GBP
Retailer 4£2,902 GBP
Retailer 2£2,962 GBP
Retailer 9£3,069 GBP
Retailer 1£3,145 GBP
Retailer 5£3,266 GBP
Retailer 6£4,585 GBP

40 data points across 9 retailers

19 retailers£2,081 GBP to £3,184 GBP

B+
Cheapest Retailer
-
£2,081 GBP
B+
Retailer 2
-
£2,105 GBP
View
B+
Retailer 3
-
£2,135 GBP
View
B
Retailer 4
-
£2,153 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,259 GBP
View
Retailer 6
-
£2,455 GBP
View
Price last confirmed 36 days ago
B
Retailer 7
-
£2,510 GBP
View
Retailer 8
-
£2,549 GBP
View
Price last confirmed 38 days ago
B
Retailer 9
-
£2,668 GBP
View
B
Retailer 10
-
£2,668 GBP
View
Retailer 11
-
£2,832 GBP
View
Price last confirmed 38 days ago
Retailer 12
-
£2,902 GBP
View
Price last confirmed 35 days ago
B
Retailer 13
-
£2,962 GBP
View
Retailer 14
-
£3,069 GBP
View
Price last confirmed 36 days ago
B
Retailer 15
-
£3,145 GBP
View
B
Retailer 16
-
£3,184 GBP
View
Retailer 17
-
£3,266 GBP
View
Price last confirmed 37 days ago
Retailer 18
-
£4,585 GBP
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
bcf9dc78-1694-4342-af5e-fb6a715fbc54 · Sep 28
£4,720 GBP
$6,318 USD
View
Price last confirmed 39 days ago
18 more retailers have this diamond
Prices start from £2,081 GBPSave up to £1,103 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+
1.20ct Round
£2,081 GBP