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Radiant|Natural|GIA

1.20ct I SI1 Radiant Natural Diamond

ID • I/SI1 • GIA 5242037212

Certificate GIA 5242037212

Diamond specifications and retailer prices

From £1,290 GBP
HK$13,500 HKD
As of November 1, 2026
Save £2,416 GBP (65%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,706 GBP at NZ Jewellers · As of October 30, 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 I 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 5242037212. Listed at 8 retailers as of October 30, 2026, with prices from £1,290 to £3,706, a £2,416 spread on the same certified stone. NZ Jewellers lists it at £3,706. 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle59.91°
OriginNatural
Grading LabGIA
CertificateGIA 5242037212
Dimensions7.10 × 5.33 × 3.65 mm
L/W Ratio1.33
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.10 mm5.33 mm1.20 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242037212
Side View
Table 64.0%CrownGirdle: MED-STKPavilion 59.91°Culet: NoneDepth 68.5%

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 1
Current: £3,706 GBP|Low: £1,290 GBP|High: £3,980 GBP|Avg: £2,339 GBP|-6.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£1,290 GBP
Retailer 2£1,751 GBP
Retailer 7£1,814 GBP
Retailer 5£1,854 GBP
Retailer 8£1,939 GBP
Retailer 4£2,696 GBP
Retailer 3£3,122 GBP
NZ Jewellers£3,706 GBP

27 data points across 8 retailers

8 retailers£1,290 GBP to £3,706 GBP

A
Cheapest Retailer
-
£1,290 GBP
HK$13,500 HKD
A
Retailer 2
-
£1,751 GBP
$2,346 USD
View
A
Retailer 3
-
£1,814 GBP
SGD 3,284 SGD
View
A
Retailer 4
-
£1,854 GBP
$2,484 USD
View
B+
Retailer 5
-
£1,939 GBP
A$3,998 AUD
View
B+
Retailer 6
-
£2,696 GBP
€3,440 EUR
View
B
Retailer 7
-
£3,122 GBP
View
Most Expensive
B
NZ Jewellers
c09eb73a-2936-4dab-a5a3-4fba6714d1d3 · Oct 30
£3,706 GBP
$4,965 USD
View
7 more retailers have this diamond
Prices start from £1,290 GBPSave up to £2,416 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
£1,290 GBP