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Round|Natural|GIA

1.21ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 6565547120

Certificate GIA 6565547120

Diamond specifications and retailer prices

From £870 GBP
As of November 5, 2026
Save £421 GBP (33%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,291 GBP at Aurelinne · As of November 5, 2026
View at Aurelinne

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6565547120. Listed at 4 retailers as of November 5, 2026, with prices from £870 to £1,291, a £421 spread on the same certified stone. Aurelinne lists it at £1,291. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6565547120
Dimensions6.78 × 6.82 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Cavity, Cloud
Top View
6.78 mm6.82 mm1.21 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6565547120
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,291 GBP|Low: £870 GBP|High: £1,291 GBP|Avg: £1,079 GBP
Aurelinne
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£870 GBP
Retailer 3£1,057 GBP
Retailer 2£1,115 GBP
Aurelinne£1,291 GBP

2 data points across 4 retailers

4 retailers£870 GBP to £1,291 GBP

A
Cheapest Retailer
-
£870 GBP
B+
Retailer 2
-
£1,057 GBP
View
B+
Retailer 3
-
£1,115 GBP
View
Most Expensive
B+
Aurelinne
fd41d8d7-6299-4438-b902-5aee52e2c242 · Nov 5
£1,291 GBP
$1,738 USD
View
3 more retailers have this diamond
Prices start from £870 GBPSave up to £421 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
£870 GBP