CaratHunter
Plans
Radiant|Natural|GIA

1.20ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 2458689031

Certificate GIA 2458689031

Diamond specifications and retailer prices

From £864 GBP
$1,157 USD
As of October 31, 2026
Save £850 GBP (50%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,282 GBP at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2458689031. Listed at 7 retailers as of October 31, 2026, with a 98% 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2458689031
Dimensions6.56 × 5.24 × 3.61 mm
L/W Ratio1.25
Top View
6.56 mm5.24 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2458689031
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 68.9%

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: Oct 31
Current: £1,714 GBP|Low: £688 GBP|High: £1,734 GBP|Avg: £1,072 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9£688 GBP
Retailer 4£864 GBP
Retailer 7£898 GBP
Retailer 5£935 GBP
Retailer 2£1,068 GBP
Retailer 8£1,113 GBP
Retailer 6£1,153 GBP
Retailer 3£1,306 GBP
Retailer 1£1,714 GBP

31 data points across 9 retailers

7 retailers£864 GBP to £1,714 GBP

A
Cheapest Retailer
-
£864 GBP
$1,157 USD
Final sale: no returns
Retailer 2
-
£935 GBP
$1,253 USD
View
Price last confirmed 39 days ago
B+
Retailer 3
-
£1,068 GBP
View
Retailer 4
-
£1,079 GBP
$1,446 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
£1,306 GBP
€1,667 EUR
View
B+
Retailer 6
-
£1,714 GBP
View
Most Expensive
NZ Jewellers
9d061dce-021d-488f-8260-ce79ce014297 · Sep 20
£2,282 GBP
$3,057 USD
View
Price last confirmed 41 days ago
6 more retailers have this diamond
Prices start from £864 GBPSave up to £850 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 Radiant
£864 GBP