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Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6541775617

Certificate GIA 6541775617

Diamond specifications and retailer prices

From £1,757 GBP
As of November 5, 2026
Save £2,435 GBP (58%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £4,192 GBP at NZ Jewellers · As of October 20, 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 6541775617. Listed at 27 retailers as of November 5, 2026, with a 139% 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6541775617
Dimensions6.75 × 6.80 × 4.24 mm
L/W Ratio1.01
Top View
6.75 mm6.80 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541775617
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.5%

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 5
Current: £2,271 GBP|Low: £1,757 GBP|High: £4,072 GBP|Avg: £2,605 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£1,757 GBP
Retailer 9£1,952 GBP
Retailer 8£2,011 GBP
Retailer 7£2,180 GBP
Retailer 1£2,271 GBP
Retailer 2£2,474 GBP
Retailer 4£2,793 GBP
Retailer 5£2,795 GBP
Retailer 6£4,013 GBP

39 data points across 9 retailers

27 retailers£1,757 GBP to £4,192 GBP

A
Cheapest Retailer
-
£1,757 GBP
A
Retailer 2
-
£1,952 GBP
View
B+
Retailer 3
-
£2,011 GBP
View
Final sale: no returns
Retailer 4
-
£2,180 GBP
View
Price last confirmed 29 days ago
Retailer 5
-
£2,180 GBP
View
Price last confirmed 50 days ago
Retailer 6
-
£2,180 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£2,180 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£2,180 GBP
View
Price last confirmed 15 days ago
B+
Retailer 9
-
£2,200 GBP
View
Retailer 10
-
£2,264 GBP
View
Price last confirmed 38 days ago
B+
Retailer 11
-
£2,271 GBP
View
B+
Retailer 12
-
£2,385 GBP
View
B+
Retailer 13
-
£2,385 GBP
View
B+
Retailer 14
-
£2,467 GBP
View
B+
Retailer 15
-
£2,474 GBP
View
Retailer 16
-
£2,515 GBP
View
Price last confirmed 28 days ago
Retailer 17
-
£2,515 GBP
View
Price last confirmed 45 days ago
Retailer 18
-
£2,515 GBP
View
Price last confirmed 16 days ago
B+
Retailer 19
-
£2,515 GBP
View
Retailer 20
-
£2,791 GBP
View
Price last confirmed 22 days ago
B+
Retailer 21
-
£2,793 GBP
View
B+
Retailer 22
-
£2,795 GBP
View
B
Retailer 23
-
£4,013 GBP
View
Retailer 24
-
£4,192 GBP
View
Price last confirmed 39 days ago
B
Retailer 25
-
£4,192 GBP
View
Retailer 26
-
£4,192 GBP
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
d7c9e451-a9e0-4de9-a2e9-d2c07c332753 · Oct 20
£4,192 GBP
$5,642 USD
View
Price last confirmed 17 days ago
26 more retailers have this diamond
Prices start from £1,757 GBPSave up to £2,435 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
£1,757 GBP