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Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2166080674

Certificate GIA 2166080674

Diamond specifications and retailer prices

From £4,926 GBP
$6,600 USD
As of October 25, 2026
Save £1,930 GBP (28%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £11,021 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

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 GIA 2166080674. Listed at 9 retailers as of October 25, 2026, with a 39% 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

1.21
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2166080674
Dimensions6.85 × 6.82 × 4.23 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.85 mm6.82 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2166080674
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: £6,855 GBP|Low: £4,926 GBP|High: £6,855 GBP|Avg: £5,918 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 2£4,926 GBP
Retailer 3£5,450 GBP
Retailer 4£6,540 GBP
Retailer 1£6,855 GBP

25 data points across 4 retailers

9 retailers£4,926 GBP to £6,855 GBP

B
Cheapest Retailer
-
£4,926 GBP
$6,600 USD
B
Retailer 2
-
£4,989 GBP
$6,685 USD
View
B
Retailer 3
-
£5,450 GBP
CA$10,142 CAD
View
B
Retailer 4
-
£6,540 GBP
$8,763 USD
View
B
Retailer 5
-
£6,568 GBP
$8,800 USD
View
B
Retailer 6
-
£6,568 GBP
$8,800 USD
View
B
Retailer 7
-
£6,784 GBP
$9,090 USD
View
B
Retailer 8
-
£6,855 GBP
€8,748 EUR
View
Most Expensive
Diamond Quarter
1.21SI2E2174BEA0N · Oct 29
£11,021 GBP
View
Price under review
8 more retailers have this diamond
Prices start from £4,926 GBPSave up to £1,930 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 Round
£4,926 GBP