Radiant|Natural|GIA

1.20ct H SI1 Radiant Natural Diamond

ID • H/SI1 • GIA 2534856644

Certificate GIA 2534856644

Diamond specifications and retailer prices

From £1,817 GBP
As of November 6, 2026
Save £2,173 GBP (54%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,569 GBP at Queensmith · As of October 28, 2026
View at Queensmith

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 2534856644. Listed at 23 retailers as of November 2, 2026, with a 120% 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2534856644
Dimensions7.24 × 5.39 × 3.65 mm
L/W Ratio1.34
Top View
7.24 mm5.39 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2534856644
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.8%

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: £4,569 GBP|Low: £1,817 GBP|High: £4,569 GBP|Avg: £2,814 GBP
Queensmith
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
Retailer 15
November 7, 2026
Retailer 6£1,817 GBP
Retailer 8£1,888 GBP
Retailer 14£2,149 GBP
Retailer 15£2,161 GBP
Retailer 3£2,179 GBP
Retailer 9£2,291 GBP
Retailer 2£2,443 GBP
Retailer 10£2,468 GBP
Retailer 11£2,527 GBP
Retailer 4£2,540 GBP
Retailer 12£2,749 GBP
Retailer 7£2,777 GBP
Retailer 13£2,882 GBP
Retailer 5£3,990 GBP
Queensmith£4,569 GBP

23 data points across 15 retailers

23 retailers£1,817 GBP to £3,990 GBP

A
Cheapest Retailer
-
£1,817 GBP
A
Retailer 2
-
£1,888 GBP
View
B+
Retailer 3
-
£2,149 GBP
View
B+
Retailer 4
-
£2,161 GBP
View
B+
Retailer 5
-
£2,179 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,263 GBP
View
B+
Retailer 7
-
£2,264 GBP
View
B+
Retailer 8
-
£2,291 GBP
View
B
Retailer 9
-
£2,407 GBP
View
Retailer 10
-
£2,409 GBP
View
Price last confirmed 22 days ago
Retailer 11
-
£2,409 GBP
View
Price last confirmed 20 days ago
B+
Retailer 12
-
£2,443 GBP
View
B+
Retailer 13
-
£2,468 GBP
View
Retailer 14
-
£2,502 GBP
View
Price last confirmed 22 days ago
B+
Retailer 15
-
£2,527 GBP
View
B+
Retailer 16
-
£2,540 GBP
View
Retailer 17
-
£2,596 GBP
View
Price last confirmed 34 days ago
B+
Retailer 18
-
£2,749 GBP
View
Retailer 19
-
£2,781 GBP
View
Price last confirmed 19 days ago
B+
Retailer 20
-
£2,882 GBP
View
B
Retailer 21
-
£3,990 GBP
View
Retailer 22
-
£4,198 GBP
View
Price last confirmed 21 days ago
Most Expensive
Queensmith
2534856644 · Oct 28
£4,569 GBP
View
Price last confirmed 9 days ago
22 more retailers have this diamond
Prices start from £1,817 GBPSave up to £2,173 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
£1,817 GBP