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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1498706583

Certificate GIA 1498706583

Diamond specifications and retailer prices

From £1,819 GBP
As of November 6, 2026
Save £2,208 GBP (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,027 GBP at NZ Jewellers · As of November 5, 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 1498706583. Listed at 21 retailers as of November 5, 2026, with prices from £1,819 to £4,027, a £2,208 spread on the same certified stone. NZ Jewellers lists it at £4,027. 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
FluorescenceFaint
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1498706583
Dimensions6.74 × 6.78 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Top View
6.74 mm6.78 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1498706583
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 6
Current: £1,914 GBP|Low: £1,667 GBP|High: £3,912 GBP|Avg: £2,465 GBP|+8.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2£1,819 GBP
Retailer 1£1,914 GBP
Retailer 9£1,967 GBP
Retailer 3£2,154 GBP
Retailer 4£2,377 GBP
Retailer 5£2,393 GBP
Retailer 10£2,469 GBP
Retailer 7£2,523 GBP
Retailer 6£2,821 GBP
Retailer 8£3,855 GBP

43 data points across 10 retailers

21 retailers£1,819 GBP to £4,027 GBP

B+
Cheapest Retailer
-
£1,819 GBP
B+
Retailer 2
-
£1,821 GBP
View
B+
Retailer 3
-
£1,875 GBP
View
B+
Retailer 4
-
£1,914 GBP
View
Final sale: no returns
Retailer 5
-
£1,967 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£2,055 GBP
View
Retailer 7
-
£2,094 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,094 GBP
View
B
Retailer 9
-
£2,118 GBP
View
B
Retailer 10
-
£2,154 GBP
View
B
Retailer 11
-
£2,353 GBP
View
B
Retailer 12
-
£2,353 GBP
View
B+
Retailer 13
-
£2,377 GBP
View
B
Retailer 14
-
£2,393 GBP
View
B
Retailer 15
-
£2,415 GBP
View
B
Retailer 16
-
£2,428 GBP
View
Retailer 17
-
£2,469 GBP
View
Price last confirmed 30 days ago
B
Retailer 18
-
£2,523 GBP
View
B
Retailer 19
-
£2,821 GBP
View
B
Retailer 20
-
£3,855 GBP
View
Most Expensive
B
NZ Jewellers
39fc103d-9290-4738-bcea-93388e39eadb · Nov 5
£4,027 GBP
$5,390 USD
View
20 more retailers have this diamond
Prices start from £1,819 GBPSave up to £2,208 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
£1,819 GBP