Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 2186430328

Certificate GIA 2186430328

Diamond specifications and retailer prices

From £1,561 GBP
As of November 4, 2026
Save £1,885 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,328 GBP at NZ Jewellers · As of September 28, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2186430328. Listed at 14 retailers as of November 4, 2026, with a 121% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2186430328
Dimensions6.91 × 5.13 × 3.63 mm
L/W Ratio1.35
Culet sizeNone
Top View
6.91 mm5.13 mm1.20 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2186430328
Side View
Table 64.0%CrownGirdle: VTK-VTKPavilionCulet: NoneDepth 70.8%

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 4
Current: £2,087 GBP|Low: £1,561 GBP|High: £3,671 GBP|Avg: £2,217 GBP|-4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 8£1,561 GBP
Retailer 9£1,681 GBP
Retailer 2£1,724 GBP
Retailer 11£1,822 GBP
Retailer 3£1,875 GBP
Retailer 4£1,913 GBP
Retailer 1£2,087 GBP
Retailer 6£2,408 GBP
Retailer 5£2,450 GBP
Retailer 10£2,840 GBP
Retailer 7£3,446 GBP

36 data points across 11 retailers

14 retailers£1,561 GBP to £3,446 GBP

B+
Cheapest Retailer
-
£1,561 GBP
B+
Retailer 2
-
£1,681 GBP
View
B+
Retailer 3
-
£1,724 GBP
View
B
Retailer 4
-
£1,822 GBP
View
Retailer 5
-
£1,875 GBP
View
Price last confirmed 40 days ago
Retailer 6
-
£1,875 GBP
View
Price last confirmed 9 days ago
B
Retailer 7
-
£1,913 GBP
View
B
Retailer 8
-
£2,087 GBP
View
Retailer 9
-
£2,164 GBP
View
Price last confirmed 39 days ago
B
Retailer 10
-
£2,408 GBP
View
B
Retailer 11
-
£2,450 GBP
View
B
Retailer 12
-
£2,840 GBP
View
B
Retailer 13
-
£3,446 GBP
View
Most Expensive
NZ Jewellers
0ab44f12-889a-4982-abb7-ee81256cb966 · Sep 28
£4,328 GBP
$5,793 USD
View
Price last confirmed 39 days ago
13 more retailers have this diamond
Prices start from £1,561 GBPSave up to £1,885 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 Radiant
£1,561 GBP