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Round|Natural|IGI

1.23ct M SI2 Round Natural Diamond

VG • M/SI2 • IGI 204668082

Shape and cutting style on the report: Round brilliant

Certificate IGI 204668082

Diamond specifications and retailer prices

From £1,397 GBP
As of November 5, 2026
Save £574 GBP (29%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,233 GBP at NZ Jewellers · As of September 28, 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 204668082. Listed at 8 retailers as of November 2, 2026, with a 41% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
M
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
Crown angle35.5°
Pavilion angle42.2°
OriginNatural
Grading LabIGI
CertificateIGI 204668082
Dimensions6.73 × 6.75 × 4.30 mm
L/W Ratio1.00
Culet sizeChipped
Cert comments
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Top View
6.73 mm6.75 mm1.23 ctM / SI2
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 204668082
Side View
Table 61.0%Crown 35.5°GirdlePavilion 42.2°Culet: CHIDepth 63.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,541 GBP|Low: £1,397 GBP|High: £1,982 GBP|Avg: £1,667 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3£1,397 GBP
Retailer 1£1,541 GBP
Retailer 4£1,546 GBP
Retailer 5£1,649 GBP
Retailer 6£1,863 GBP
Retailer 2£1,970 GBP

36 data points across 6 retailers

8 retailers£1,397 GBP to £1,970 GBP

B
Cheapest Retailer
-
£1,397 GBP
B
Retailer 2
-
£1,541 GBP
View
Retailer 3
-
£1,546 GBP
View
Price last confirmed 39 days ago
Retailer 4
-
£1,617 GBP
View
Price last confirmed 38 days ago
B
Retailer 5
-
£1,649 GBP
View
Retailer 6
-
£1,784 GBP
View
Price last confirmed 38 days ago
C
Retailer 7
-
£1,970 GBP
View
Most Expensive
NZ Jewellers
6a8ac142-d8f7-4b15-a8fd-29fdfb79c566 · Sep 28
£3,233 GBP
$4,351 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from £1,397 GBPSave up to £574 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
£1,397 GBP