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Round|Natural|GIA

1.20ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2526041324

Certificate GIA 2526041324

Diamond specifications and retailer prices

From £1,600 GBP
As of November 6, 2026
Save £2,851 GBP (64%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £4,451 GBP at NZ Jewellers · As of October 20, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2526041324. Listed at 27 retailers as of November 5, 2026, with a 178% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2526041324
Dimensions6.78 × 6.74 × 4.21 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.78 mm6.74 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2526041324
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

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 6
Current: £2,037 GBP|Low: £1,600 GBP|High: £3,604 GBP|Avg: £2,220 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£1,600 GBP
Retailer 2£1,727 GBP
Retailer 10£1,779 GBP
Retailer 9£1,855 GBP
Retailer 8£1,929 GBP
Retailer 1£2,037 GBP
Retailer 3£2,240 GBP
Retailer 5£2,473 GBP
Retailer 4£2,505 GBP
Retailer 6£3,551 GBP

37 data points across 10 retailers

27 retailers£1,600 GBP to £4,451 GBP

A
Cheapest Retailer
-
£1,600 GBP
B+
Retailer 2
-
£1,727 GBP
View
B+
Retailer 3
-
£1,779 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,855 GBP
View
Retailer 5
-
£1,929 GBP
View
Price last confirmed 29 days ago
Retailer 6
-
£1,929 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£1,929 GBP
View
Price last confirmed 50 days ago
Retailer 8
-
£1,929 GBP
View
Price last confirmed 21 days ago
Retailer 9
-
£1,929 GBP
View
Price last confirmed 15 days ago
B+
Retailer 10
-
£1,958 GBP
View
Retailer 11
-
£2,018 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£2,037 GBP
View
B
Retailer 13
-
£2,125 GBP
View
B
Retailer 14
-
£2,125 GBP
View
B
Retailer 15
-
£2,192 GBP
View
Retailer 16
-
£2,225 GBP
View
Price last confirmed 28 days ago
Retailer 17
-
£2,225 GBP
View
Price last confirmed 45 days ago
Retailer 18
-
£2,225 GBP
View
Price last confirmed 16 days ago
B+
Retailer 19
-
£2,225 GBP
View
B+
Retailer 20
-
£2,240 GBP
View
B
Retailer 21
-
£2,473 GBP
View
B
Retailer 22
-
£2,505 GBP
View
B
Retailer 23
-
£3,551 GBP
View
Retailer 24
-
£4,451 GBP
View
Price last confirmed 39 days ago
B
Retailer 25
-
£4,451 GBP
View
Retailer 26
-
£4,451 GBP
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
9811674a-166a-49bf-a6c5-2c336768c947 · Oct 20
£4,451 GBP
$5,990 USD
View
Price last confirmed 17 days ago
26 more retailers have this diamond
Prices start from £1,600 GBPSave up to £2,851 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
1.20ct Round
£1,600 GBP