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Round|Natural|GIA

1.20ct J SI2 Round Natural Diamond

VG • J/SI2 • GIA 5413856974

Certificate GIA 5413856974

Diamond specifications and retailer prices

From £1,312 GBP
As of November 6, 2026
Save £2,378 GBP (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,690 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 SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 5413856974. Listed at 16 retailers as of November 5, 2026, with prices from £1,312 to £3,690, a £2,378 spread on the same certified stone. NZ Jewellers lists it at £3,690. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5413856974
Dimensions6.64 × 6.60 × 4.27 mm
L/W Ratio1.01
Top View
6.64 mm6.60 mm1.20 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5413856974
Side View
Table 55.0%CrownGirdle: ThickPavilionCulet: NoneDepth 64.5%

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: Nov 6
Current: £3,690 GBP|Low: £1,302 GBP|High: £3,690 GBP|Avg: £1,972 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 11£1,312 GBP
Retailer 4£1,418 GBP
Retailer 3£1,629 GBP
Retailer 5£1,667 GBP
Retailer 2£1,689 GBP
Retailer 12£1,765 GBP
Retailer 14£1,765 GBP
Retailer 6£1,808 GBP
Retailer 7£1,820 GBP
Retailer 13£1,846 GBP
Retailer 8£1,856 GBP
Retailer 15£2,037 GBP
Retailer 9£2,186 GBP
Retailer 10£3,083 GBP
NZ Jewellers£3,690 GBP

33 data points across 15 retailers

16 retailers£1,312 GBP to £3,690 GBP

B+
Cheapest Retailer
-
£1,312 GBP
B+
Retailer 2
-
£1,418 GBP
View
B+
Retailer 3
-
£1,594 GBP
View
B+
Retailer 4
-
£1,629 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,667 GBP
View
B+
Retailer 6
-
£1,689 GBP
View
B+
Retailer 7
-
£1,765 GBP
View
Retailer 8
-
£1,765 GBP
View
Price last confirmed 8 days ago
B
Retailer 9
-
£1,820 GBP
View
B
Retailer 10
-
£1,825 GBP
View
B
Retailer 11
-
£1,846 GBP
View
B+
Retailer 12
-
£1,856 GBP
View
B
Retailer 13
-
£2,037 GBP
View
B
Retailer 14
-
£2,186 GBP
View
B
Retailer 15
-
£3,083 GBP
View
Most Expensive
C
NZ Jewellers
c20cbec8-2845-4dbb-8aeb-19600532dd5d · Nov 5
£3,690 GBP
$4,966 USD
View
15 more retailers have this diamond
Prices start from £1,312 GBPSave up to £2,378 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
£1,312 GBP