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Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6522585574

Certificate GIA 6522585574

Diamond specifications and retailer prices

From £2,007 GBP
As of November 6, 2026
Save £2,684 GBP (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,691 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6522585574. Listed at 19 retailers as of November 5, 2026, with prices from £2,007 to £4,691, a £2,684 spread on the same certified stone. NZ Jewellers lists it at £4,691. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6522585574
Dimensions6.79 × 6.73 × 4.22 mm
L/W Ratio1.01
Top View
6.79 mm6.73 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6522585574
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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 6
Current: £4,691 GBP|Low: £1,989 GBP|High: £4,691 GBP|Avg: £2,898 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 6, 2026
Retailer 2£2,007 GBP
Retailer 18£2,008 GBP
Retailer 5£2,390 GBP
Retailer 16£2,413 GBP
Retailer 10£2,485 GBP
Retailer 11£2,576 GBP
Retailer 6£2,589 GBP
Retailer 4£2,693 GBP
Retailer 9£2,693 GBP
Retailer 13£2,770 GBP
Retailer 12£2,796 GBP
Retailer 7£2,796 GBP
Retailer 8£2,801 GBP
Retailer 3£3,106 GBP
Retailer 14£3,127 GBP
Retailer 15£3,287 GBP
Retailer 17£4,503 GBP
NZ Jewellers£4,691 GBP

24 data points across 18 retailers

19 retailers£2,007 GBP to £4,691 GBP

A
Cheapest Retailer
-
£2,007 GBP
A
Retailer 2
-
£2,008 GBP
View
B+
Retailer 3
-
£2,390 GBP
View
B+
Retailer 4
-
£2,413 GBP
View
B+
Retailer 5
-
£2,485 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,576 GBP
View
B+
Retailer 7
-
£2,589 GBP
View
B+
Retailer 8
-
£2,693 GBP
View
Retailer 9
-
£2,693 GBP
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£2,770 GBP
View
B+
Retailer 11
-
£2,796 GBP
View
B+
Retailer 12
-
£2,796 GBP
View
B+
Retailer 13
-
£2,801 GBP
View
Retailer 14
-
£2,948 GBP
View
Price last confirmed 29 days ago
B+
Retailer 15
-
£3,106 GBP
View
B+
Retailer 16
-
£3,127 GBP
View
B+
Retailer 17
-
£3,287 GBP
View
B
Retailer 18
-
£4,503 GBP
View
Most Expensive
B
NZ Jewellers
b925d230-40f5-4a38-baa3-40e6d16c4a2c · Nov 5
£4,691 GBP
$6,279 USD
View
18 more retailers have this diamond
Prices start from £2,007 GBPSave up to £2,684 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
£2,007 GBP