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Radiant|Natural|GIA

1.20ct J SI2 Radiant Natural Diamond

VG • J/SI2 • GIA 3565412188

Certificate GIA 3565412188

Diamond specifications and retailer prices

From £1,379 GBP
SGD 2,496 SGD
As of October 31, 2026
Save £1,135 GBP (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,514 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 3565412188. Listed at 12 retailers as of October 30, 2026, with prices from £1,379 to £2,514, a £1,135 spread on the same certified stone. Helzberg Diamonds lists it at £2,514. 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 (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3565412188
Dimensions7.05 × 5.25 × 3.62 mm
L/W Ratio1.34
Culet sizeNone
Top View
7.05 mm5.25 mm1.20 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3565412188
Side View
Table 68.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 69.0%

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: £2,514 GBP|Low: £1,379 GBP|High: £2,795 GBP|Avg: £1,858 GBP|-10.1%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 12£1,379 GBP
Retailer 9£1,391 GBP
Retailer 6£1,403 GBP
Retailer 3£1,433 GBP
Retailer 11£1,528 GBP
Retailer 2£1,537 GBP
Retailer 7£1,673 GBP
Retailer 5£1,761 GBP
Retailer 10£1,799 GBP
Retailer 8£1,972 GBP
Retailer 4£2,427 GBP
Helzberg Diamonds£2,514 GBP

32 data points across 12 retailers

12 retailers£1,379 GBP to £2,514 GBP

A
Cheapest Retailer
-
£1,379 GBP
SGD 2,496 SGD
A
Retailer 2
-
£1,391 GBP
$1,864 USD
View
A
Retailer 3
-
£1,403 GBP
$1,880 USD
View
B+
Retailer 4
-
£1,433 GBP
$1,920 USD
View
B+
Retailer 5
-
£1,528 GBP
SGD 2,767 SGD
View
B+
Retailer 6
-
£1,537 GBP
View
B+
Retailer 7
-
£1,673 GBP
$2,242 USD
View
B+
Retailer 8
-
£1,761 GBP
$2,359 USD
View
B+
Retailer 9
-
£1,799 GBP
$2,411 USD
View
B
Retailer 10
-
£1,972 GBP
€2,516 EUR
View
B
Retailer 11
-
£2,427 GBP
$3,252 USD
View
Most Expensive
B
Helzberg Diamonds
XZRJLMLKHIHOO · Oct 30
£2,514 GBP
$3,368 USD
View
11 more retailers have this diamond
Prices start from £1,379 GBPSave up to £1,135 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
£1,379 GBP