Round|Natural|HRD

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • HRD 250000092403

Certificate HRD 250000092403

Diamond specifications and retailer prices

From £1,466 GBP
$1,964 USD
As of October 30, 2026
Save £1,392 GBP (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,392 GBP at NZ Jewellers · As of September 28, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by HRD 250000092403. Listed at 13 retailers as of October 29, 2026, with a 95% 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.9°
OriginNatural
Grading LabHRD
CertificateHRD 250000092403
Dimensions6.74 × 6.80 × 4.28 mm
L/W Ratio1.01
Top View
6.74 mm6.80 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 250000092403
Side View
Table 56.0%Crown 36.6°GirdlePavilion 40.9°Culet: NoneDepth 63.1%

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: Oct 30
Current: £2,027 GBP|Low: £1,373 GBP|High: £2,877 GBP|Avg: £1,955 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 4£1,466 GBP
Retailer 3£1,497 GBP
Retailer 5£1,548 GBP
Retailer 6£1,623 GBP
Retailer 7£1,726 GBP
Retailer 1£2,027 GBP
Retailer 8£2,621 GBP
Retailer 2£2,858 GBP

23 data points across 8 retailers

13 retailers£1,466 GBP to £2,858 GBP

A
Cheapest Retailer
-
£1,466 GBP
$1,964 USD
B+
Retailer 2
-
£1,548 GBP
$2,074 USD
View
Retailer 3
-
£1,623 GBP
$2,174 USD
View
Price last confirmed 54 days ago
Retailer 4
-
£1,623 GBP
$2,174 USD
View
Price last confirmed 15 days ago
Retailer 5
-
£1,623 GBP
$2,174 USD
View
Price last confirmed 23 days ago
Retailer 6
-
£1,697 GBP
$2,274 USD
View
Price last confirmed 16 days ago
B+
Retailer 7
-
£1,726 GBP
$2,313 USD
View
Retailer 8
-
£1,873 GBP
$2,509 USD
View
Price last confirmed 54 days ago
Retailer 9
-
£1,873 GBP
$2,509 USD
View
Price last confirmed 22 days ago
B
Retailer 10
-
£2,027 GBP
€2,586 EUR
View
B
Retailer 11
-
£2,858 GBP
View
Retailer 12
-
£3,392 GBP
$4,545 USD
View
Price last confirmed 60 days ago
Most Expensive
NZ Jewellers
33755be7-11a6-4969-be68-4e4f14b16e46 · Sep 28
£3,392 GBP
$4,545 USD
View
Price last confirmed 33 days ago
12 more retailers have this diamond
Prices start from £1,466 GBPSave up to £1,392 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
£1,466 GBP