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Radiant|Natural|GIA

1.21ct G SI1 Radiant Natural Diamond

VG • G/SI1 • GIA 2437946155

Certificate GIA 2437946155

Diamond specifications and retailer prices

From £2,492 GBP
As of November 4, 2026
Save £1,190 GBP (32%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,681 GBP at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2437946155. Listed at 6 retailers as of November 4, 2026, with prices from £2,492 to £3,681, a £1,190 spread on the same certified stone. 77 Diamonds lists it at £3,681. 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

1.21
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle46.26°
Pavilion angle29.17°
OriginNatural
Grading LabGIA
CertificateGIA 2437946155
Dimensions6.83 × 5.56 × 3.40 mm
L/W Ratio1.23
Top View
6.83 mm5.56 mm1.21 ctG / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2437946155
Side View
Table 73.0%Crown 46.26°Girdle: ThickPavilion 29.17°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,681 GBP|Low: £2,344 GBP|High: £3,726 GBP|Avg: £2,759 GBP|+1.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 5£2,492 GBP
Retailer 3£2,511 GBP
Retailer 4£2,553 GBP
Retailer 2£2,578 GBP
77 Diamonds£3,681 GBP

39 data points across 5 retailers

6 retailers£2,492 GBP to £3,681 GBP

B+
Cheapest Retailer
-
£2,492 GBP
B+
Retailer 2
-
£2,511 GBP
View
B+
Retailer 3
-
£2,553 GBP
View
B+
Retailer 4
-
£2,578 GBP
View
Final sale: no returns
B
Retailer 5
-
£2,688 GBP
View
Most Expensive
B
77 Diamonds
RADZXCYGQPAM · Nov 7
£3,681 GBP
View
5 more retailers have this diamond
Prices start from £2,492 GBPSave up to £1,190 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.

B+
1.21ct Radiant
£2,492 GBP