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Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

GD • K/SI1 • GIA 2556797520

Certificate GIA 2556797520

Diamond specifications and retailer prices

From £1,033 GBP
As of November 6, 2026
Save £2,351 GBP (69%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,384 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2556797520. Listed at 16 retailers as of November 5, 2026, with prices from £1,033 to £3,384, a £2,351 spread on the same certified stone. NZ Jewellers lists it at £3,384. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556797520
Dimensions7.17 × 5.31 × 3.72 mm
L/W Ratio1.35
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Pinpoint, Needle
Top View
7.17 mm5.31 mm1.20 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556797520
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 70.1%

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: £3,384 GBP|Low: £1,033 GBP|High: £3,443 GBP|Avg: £1,652 GBP|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 7, 2026
Retailer 9£1,033 GBP
Retailer 14£1,264 GBP
Retailer 2£1,274 GBP
Retailer 8£1,302 GBP
Retailer 12£1,387 GBP
Retailer 6£1,404 GBP
Retailer 3£1,452 GBP
Retailer 10£1,490 GBP
Retailer 7£1,506 GBP
Retailer 4£1,601 GBP
Retailer 13£1,693 GBP
Retailer 11£1,764 GBP
Retailer 5£2,445 GBP
NZ Jewellers£3,384 GBP

25 data points across 14 retailers

16 retailers£1,033 GBP to £3,384 GBP

A
Cheapest Retailer
-
£1,033 GBP
B+
Retailer 2
-
£1,264 GBP
View
B+
Retailer 3
-
£1,274 GBP
View
B+
Retailer 4
-
£1,302 GBP
View
B+
Retailer 5
-
£1,387 GBP
View
Retailer 6
-
£1,404 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£1,452 GBP
View
B+
Retailer 8
-
£1,490 GBP
View
B+
Retailer 9
-
£1,506 GBP
View
Retailer 10
-
£1,554 GBP
View
Price last confirmed 39 days ago
B+
Retailer 11
-
£1,601 GBP
View
Retailer 12
-
£1,657 GBP
View
Price last confirmed 62 days ago
B+
Retailer 13
-
£1,693 GBP
View
B
Retailer 14
-
£1,764 GBP
View
B
Retailer 15
-
£2,445 GBP
View
Most Expensive
C
NZ Jewellers
c20c1bc0-666b-47b3-9666-dd86d4768dea · Nov 5
£3,384 GBP
$4,530 USD
View
15 more retailers have this diamond
Prices start from £1,033 GBPSave up to £2,351 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
£1,033 GBP