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Round|Natural|IGI

1.23ct K I1 Round Natural Diamond

EX • K/I1 • IGI 341806037

Shape and cutting style on the report: Round brilliant

Certificate IGI 341806037

Diamond specifications and retailer prices

From £929 GBP
As of November 4, 2026
Save £1,515 GBP (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,444 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by IGI 341806037. Listed at 9 retailers as of November 4, 2026, with prices from £929 to £2,444, a £1,515 spread on the same certified stone. NZ Jewellers lists it at £2,444. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle32°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 341806037
Dimensions6.97 × 7.00 × 4.14 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
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Top View
6.97 mm7.00 mm1.23 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 341806037
Side View
Table 61.5%Crown 32°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,281 GBP|Low: £929 GBP|High: £1,297 GBP|Avg: £1,118 GBP|+0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 4£929 GBP
Retailer 2£1,065 GBP
Retailer 3£1,192 GBP
Retailer 1£1,281 GBP

17 data points across 4 retailers

9 retailers£929 GBP to £2,444 GBP

B+
Cheapest Retailer
-
£929 GBP
B+
Retailer 2
-
£1,002 GBP
View
Retailer 3
-
£1,002 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£1,048 GBP
View
B+
Retailer 5
-
£1,065 GBP
View
B+
Retailer 6
-
£1,156 GBP
View
B+
Retailer 7
-
£1,281 GBP
View
B
Retailer 8
-
£1,456 GBP
View
Most Expensive
C
NZ Jewellers
2fe6ab8a-d131-4877-a365-51c1f3555504 · Nov 5
£2,444 GBP
$3,290 USD
View
8 more retailers have this diamond
Prices start from £929 GBPSave up to £1,515 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+
1.23ct Round
£929 GBP