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Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6531575129

Certificate GIA 6531575129

Diamond specifications and retailer prices

From £1,117 GBP
As of November 7, 2026
Save £1,712 GBP (61%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,829 GBP at NZ Jewellers · As of November 5, 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 6531575129. Listed at 11 retailers as of November 5, 2026, with prices from £1,117 to £2,829, a £1,712 spread on the same certified stone. NZ Jewellers lists it at £2,829. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6531575129
Dimensions6.21 × 5.39 × 3.78 mm
L/W Ratio1.15
Top View
6.21 mm5.39 mm1.20 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6531575129
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 70.2%

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 7
Current: £2,829 GBP|Low: £1,117 GBP|High: £2,829 GBP|Avg: £1,491 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 3£1,117 GBP
Retailer 5£1,125 GBP
Retailer 8£1,160 GBP
Retailer 10£1,160 GBP
Retailer 11£1,213 GBP
Retailer 4£1,281 GBP
Retailer 9£1,338 GBP
Retailer 7£1,415 GBP
Retailer 6£1,575 GBP
Retailer 2£2,021 GBP
NZ Jewellers£2,829 GBP

32 data points across 11 retailers

11 retailers£1,117 GBP to £2,829 GBP

B+
Cheapest Retailer
-
£1,117 GBP
A
Retailer 2
-
£1,125 GBP
View
B+
Retailer 3
-
£1,160 GBP
View
Retailer 4
-
£1,160 GBP
View
Price last confirmed 9 days ago
B+
Retailer 5
-
£1,213 GBP
View
B+
Retailer 6
-
£1,281 GBP
View
B+
Retailer 7
-
£1,338 GBP
View
B+
Retailer 8
-
£1,415 GBP
View
B+
Retailer 9
-
£1,575 GBP
View
B
Retailer 10
-
£2,021 GBP
View
Most Expensive
B
NZ Jewellers
ad3ee33d-30af-4327-9fc5-47758b419eef · Nov 5
£2,829 GBP
$3,787 USD
View
10 more retailers have this diamond
Prices start from £1,117 GBPSave up to £1,712 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
£1,117 GBP