CaratHunter
Plans
Round|Natural|IGI

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • IGI 779634139

Shape and cutting style on the report: Round brilliant

Certificate IGI 779634139

Diamond specifications and retailer prices

From £1,417 GBP
₹180,808 INR
As of October 30, 2026
Save £2,354 GBP (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,770 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 779634139. Listed at 11 retailers as of October 30, 2026, with prices from £1,417 to £3,770, a £2,354 spread on the same certified stone. NZ Jewellers lists it at £3,770. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 779634139
Dimensions6.84 × 6.86 × 4.23 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.84 mm6.86 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 779634139
Side View
Table 57.0%Crown 33.6°Girdle: THN-MEDPavilion 41.3°Culet: NoneDepth 61.8%

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: Oct 30
Current: £3,770 GBP|Low: £1,409 GBP|High: £3,864 GBP|Avg: £2,153 GBP|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2£1,417 GBP
Retailer 4£1,596 GBP
Retailer 6£1,631 GBP
Retailer 9£1,665 GBP
Retailer 8£1,797 GBP
Retailer 3£1,804 GBP
Retailer 11£1,887 GBP
Retailer 10£2,081 GBP
Retailer 5£2,207 GBP
Retailer 7£3,164 GBP
NZ Jewellers£3,770 GBP

39 data points across 11 retailers

11 retailers£1,417 GBP to £3,770 GBP

A
Cheapest Retailer
-
£1,417 GBP
₹180,808 INR
A
Retailer 2
-
£1,596 GBP
View
A
Retailer 3
-
£1,631 GBP
$2,185 USD
View
A
Retailer 4
-
£1,665 GBP
$2,231 USD
View
Final sale: no returns
A
Retailer 5
-
£1,797 GBP
$2,408 USD
View
A
Retailer 6
-
£1,804 GBP
$2,417 USD
View
A
Retailer 7
-
£1,887 GBP
$2,528 USD
View
A
Retailer 8
-
£2,081 GBP
$2,788 USD
View
A
Retailer 9
-
£2,207 GBP
€2,816 EUR
View
B+
Retailer 10
-
£3,164 GBP
View
Most Expensive
B+
NZ Jewellers
2729b77f-b415-4795-b31a-ecc61c79a24e · Oct 30
£3,770 GBP
$5,052 USD
View
10 more retailers have this diamond
Prices start from £1,417 GBPSave up to £2,354 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
1.21ct Round
£1,417 GBP