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Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2416493551

Certificate GIA 2416493551

Diamond specifications and retailer prices

From £2,144 GBP
As of November 4, 2026
Save £2,633 GBP (55%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,777 GBP at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2416493551. Listed at 19 retailers as of November 4, 2026, with prices from £2,144 to £4,777, a £2,633 spread on the same certified stone. NZ Jewellers lists it at £4,777. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2416493551
Dimensions6.80 × 6.76 × 4.24 mm
L/W Ratio1.01
Top View
6.80 mm6.76 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2416493551
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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 4
Current: £4,777 GBP|Low: £2,057 GBP|High: £4,820 GBP|Avg: £2,881 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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 5, 2026
Retailer 14£2,144 GBP
Retailer 18£2,161 GBP
Retailer 5£2,204 GBP
Retailer 6£2,292 GBP
Retailer 15£2,333 GBP
Retailer 9£2,484 GBP
Retailer 10£2,484 GBP
Retailer 3£2,493 GBP
Retailer 17£2,579 GBP
Retailer 7£2,779 GBP
Retailer 16£2,779 GBP
Retailer 12£2,820 GBP
Retailer 2£2,838 GBP
Retailer 8£2,875 GBP
Retailer 11£2,998 GBP
Retailer 4£3,105 GBP
Retailer 13£4,572 GBP
NZ Jewellers£4,777 GBP

39 data points across 18 retailers

19 retailers£2,144 GBP to £4,777 GBP

A
Cheapest Retailer
-
£2,144 GBP
A
Retailer 2
-
£2,161 GBP
View
B+
Retailer 3
-
£2,204 GBP
View
B+
Retailer 4
-
£2,285 GBP
View
B+
Retailer 5
-
£2,292 GBP
View
Final sale: no returns
Retailer 6
-
£2,333 GBP
View
Price last confirmed 17 days ago
Retailer 7
-
£2,484 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,484 GBP
View
B+
Retailer 9
-
£2,493 GBP
View
B+
Retailer 10
-
£2,579 GBP
View
B
Retailer 11
-
£2,779 GBP
View
B
Retailer 12
-
£2,779 GBP
View
B
Retailer 13
-
£2,794 GBP
View
B+
Retailer 14
-
£2,820 GBP
View
B
Retailer 15
-
£2,838 GBP
View
B
Retailer 16
-
£2,875 GBP
View
B+
Retailer 17
-
£2,998 GBP
View
B
Retailer 18
-
£4,572 GBP
View
Most Expensive
B
NZ Jewellers
016afa2a-a770-4c4a-8e1c-d63ca2ad3294 · Nov 5
£4,777 GBP
$6,429 USD
View
18 more retailers have this diamond
Prices start from £2,144 GBPSave up to £2,633 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
£2,144 GBP