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Radiant|Natural|GIA

1.20ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 6243078579

Certificate GIA 6243078579

Diamond specifications and retailer prices

From £1,674 GBP
As of November 6, 2026
Save £2,315 GBP (58%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,988 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6243078579. Listed at 10 retailers as of November 5, 2026, with prices from £1,674 to £3,988, a £2,315 spread on the same certified stone. NZ Jewellers lists it at £3,988. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle62.46°
OriginNatural
Grading LabGIA
CertificateGIA 6243078579
Dimensions7.00 × 5.37 × 3.73 mm
L/W Ratio1.30
Key to symbols
Crystal, Needle
Top View
7.00 mm5.37 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6243078579
Side View
Table 62.0%CrownGirdle: ThickPavilion 62.46°Culet: NoneDepth 69.4%

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: £3,988 GBP|Low: £1,674 GBP|High: £4,160 GBP|Avg: £2,768 GBP|-4.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3£1,674 GBP
Retailer 4£2,197 GBP
Retailer 8£2,289 GBP
Retailer 5£2,323 GBP
Retailer 2£2,351 GBP
Retailer 9£2,481 GBP
Retailer 7£2,708 GBP
Retailer 10£3,538 GBP
Retailer 6£3,818 GBP
NZ Jewellers£3,988 GBP

31 data points across 10 retailers

10 retailers£1,674 GBP to £3,988 GBP

A
Cheapest Retailer
-
£1,674 GBP
B+
Retailer 2
-
£2,197 GBP
View
B+
Retailer 3
-
£2,289 GBP
View
B+
Retailer 4
-
£2,323 GBP
View
B+
Retailer 5
-
£2,351 GBP
View
B+
Retailer 6
-
£2,481 GBP
View
B+
Retailer 7
-
£2,708 GBP
View
Retailer 8
-
£3,538 GBP
View
Price last confirmed 17 days ago
B
Retailer 9
-
£3,818 GBP
View
Most Expensive
B
NZ Jewellers
d2cdbb5c-de44-45f6-a0c2-4a37f92a3f19 · Nov 5
£3,988 GBP
$5,338 USD
View
9 more retailers have this diamond
Prices start from £1,674 GBPSave up to £2,315 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
£1,674 GBP