CaratHunter
Plans
Round|Natural|GIA

1.20ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2507070551

Certificate GIA 2507070551

Diamond specifications and retailer prices

From £1,112 GBP
As of November 6, 2026
Save £2,505 GBP (69%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,617 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 top-tier cut grade and certified by GIA 2507070551. Listed at 19 retailers as of November 5, 2026, with prices from £1,112 to £3,617, a £2,505 spread on the same certified stone. NZ Jewellers lists it at £3,617. 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
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2507070551
Dimensions6.77 × 6.73 × 4.26 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Top View
6.77 mm6.73 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2507070551
Side View
Table 56.0%Crown 36°Girdle: Sli. ThickPavilion 41.2°Culet: NoneDepth 63.3%

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: £3,617 GBP|Low: £1,103 GBP|High: £3,617 GBP|Avg: £1,689 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
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 16£1,112 GBP
Retailer 2£1,122 GBP
Retailer 15£1,304 GBP
Retailer 7£1,340 GBP
Retailer 10£1,408 GBP
Retailer 11£1,418 GBP
Retailer 8£1,473 GBP
Retailer 6£1,483 GBP
Retailer 17£1,483 GBP
Retailer 18£1,551 GBP
Retailer 9£1,553 GBP
Retailer 5£1,585 GBP
Retailer 12£1,601 GBP
Retailer 4£1,711 GBP
Retailer 13£1,905 GBP
Retailer 3£2,159 GBP
Retailer 14£2,591 GBP
NZ Jewellers£3,617 GBP

23 data points across 18 retailers

19 retailers£1,112 GBP to £3,617 GBP

A
Cheapest Retailer
-
£1,112 GBP
A
Retailer 2
-
£1,122 GBP
View
A
Retailer 3
-
£1,304 GBP
View
A
Retailer 4
-
£1,340 GBP
View
Retailer 5
-
£1,345 GBP
View
Price last confirmed 109 days ago
Retailer 6
-
£1,408 GBP
View
Price last confirmed 13 days ago
A
Retailer 7
-
£1,418 GBP
View
A
Retailer 8
-
£1,473 GBP
View
B+
Retailer 9
-
£1,483 GBP
View
Retailer 10
-
£1,483 GBP
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£1,551 GBP
View
Retailer 12
-
£1,553 GBP
View
Price last confirmed 10 days ago
B+
Retailer 13
-
£1,585 GBP
View
B+
Retailer 14
-
£1,601 GBP
View
B+
Retailer 15
-
£1,711 GBP
View
B+
Retailer 16
-
£1,905 GBP
View
B
Retailer 17
-
£2,159 GBP
View
B
Retailer 18
-
£2,591 GBP
View
Most Expensive
C
NZ Jewellers
f681003a-2f6a-4e28-bfee-41408dd3dba0 · Nov 5
£3,617 GBP
$4,868 USD
View
18 more retailers have this diamond
Prices start from £1,112 GBPSave up to £2,505 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
£1,112 GBP