Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 6521400249

Certificate GIA 6521400249

Diamond specifications and retailer prices

From £1,042 GBP
As of November 6, 2026
Save £1,343 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,349 GBP at NZ Jewellers · As of October 17, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6521400249. Listed at 18 retailers as of November 4, 2026, with a 129% 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6521400249
Dimensions7.24 × 5.37 × 3.59 mm
L/W Ratio1.35
Top View
7.24 mm5.37 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6521400249
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.9%

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: Nov 6
Current: £1,315 GBP|Low: £1,042 GBP|High: £2,432 GBP|Avg: £1,542 GBP
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 2£1,042 GBP
Retailer 5£1,095 GBP
Retailer 9£1,303 GBP
Retailer 1£1,315 GBP
Retailer 6£1,325 GBP
Retailer 7£1,452 GBP
Retailer 3£1,467 GBP
Retailer 4£1,515 GBP
Retailer 10£1,666 GBP
Retailer 8£1,855 GBP
Retailer 11£2,385 GBP

28 data points across 11 retailers

18 retailers£1,042 GBP to £2,385 GBP

A
Cheapest Retailer
-
£1,042 GBP
A
Retailer 2
-
£1,095 GBP
View
A
Retailer 3
-
£1,303 GBP
View
A
Retailer 4
-
£1,315 GBP
View
A
Retailer 5
-
£1,318 GBP
View
A
Retailer 6
-
£1,325 GBP
View
Retailer 7
-
£1,373 GBP
View
Price last confirmed 22 days ago
Retailer 8
-
£1,373 GBP
View
Price last confirmed 20 days ago
Retailer 9
-
£1,437 GBP
View
Price last confirmed 22 days ago
B+
Retailer 10
-
£1,451 GBP
View
B+
Retailer 11
-
£1,452 GBP
View
B+
Retailer 12
-
£1,467 GBP
View
B+
Retailer 13
-
£1,515 GBP
View
Retailer 14
-
£1,585 GBP
View
Price last confirmed 19 days ago
B+
Retailer 15
-
£1,666 GBP
View
B+
Retailer 16
-
£1,855 GBP
View
B
Retailer 17
-
£2,385 GBP
View
Most Expensive
NZ Jewellers
5544a268-c8f8-424f-a9e6-e1c5fe161a91 · Oct 17
£3,349 GBP
$4,483 USD
View
Price last confirmed 20 days ago
17 more retailers have this diamond
Prices start from £1,042 GBPSave up to £1,343 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
£1,042 GBP