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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2527034998

Certificate GIA 2527034998

Diamond specifications and retailer prices

From £3,349 GBP
As of November 4, 2026
Save £3,074 GBP (48%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £6,423 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2527034998. Listed at 13 retailers as of November 4, 2026, with prices from £3,349 to £6,423, a £3,074 spread on the same certified stone. NZ Jewellers lists it at £6,423. 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

1.21
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.56°
Pavilion angle30.52°
OriginNatural
Grading LabGIA
CertificateGIA 2527034998
Dimensions7.03 × 5.18 × 3.54 mm
L/W Ratio1.36
Girdle conditionThick
Key to symbols
Crystal, Feather
Top View
7.03 mm5.18 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2527034998
Side View
Table 63.0%Crown 43.56°GirdlePavilion 30.52°CuletDepth 68.3%

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: £6,423 GBP|Low: £3,249 GBP|High: £6,423 GBP|Avg: £4,335 GBP
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 6, 2026
Retailer 11£3,349 GBP
Retailer 5£3,453 GBP
Retailer 10£3,544 GBP
Retailer 2£3,725 GBP
Retailer 3£3,840 GBP
Retailer 13£3,840 GBP
Retailer 14£3,840 GBP
Retailer 12£3,871 GBP
Retailer 7£4,321 GBP
Retailer 6£4,397 GBP
Retailer 4£4,431 GBP
Retailer 8£4,685 GBP
Retailer 9£6,099 GBP
NZ Jewellers£6,423 GBP

36 data points across 14 retailers

13 retailers£3,349 GBP to £6,423 GBP

B+
Cheapest Retailer
-
£3,349 GBP
B+
Retailer 2
-
£3,453 GBP
View
B
Retailer 3
-
£3,544 GBP
View
Final sale: no returns
B
Retailer 4
-
£3,609 GBP
View
B+
Retailer 5
-
£3,725 GBP
View
B
Retailer 6
-
£3,840 GBP
View
B
Retailer 7
-
£3,840 GBP
View
Retailer 8
-
£3,871 GBP
View
Price last confirmed 29 days ago
B
Retailer 9
-
£4,321 GBP
View
B
Retailer 10
-
£4,431 GBP
View
B
Retailer 11
-
£4,685 GBP
View
B
Retailer 12
-
£6,099 GBP
View
Most Expensive
B
NZ Jewellers
a9aa4bc4-7d42-4326-8662-e0689a919691 · Nov 5
£6,423 GBP
$8,597 USD
View
12 more retailers have this diamond
Prices start from £3,349 GBPSave up to £3,074 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
£3,349 GBP