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1.23ct J SI2 Round Natural Diamond

VG • J/SI2 • HRD 220000154301

Shape and cutting style on the report: Brilliant

Certificate HRD 220000154301

Diamond specifications and retailer prices

From £1,264 GBP
As of November 5, 2026
Save £2,120 GBP (63%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,384 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by HRD 220000154301. Listed at 11 retailers as of November 5, 2026, with prices from £1,264 to £3,384, a £2,120 spread on the same certified stone. NZ Jewellers lists it at £3,384. 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
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceStrong
Crown angle36.6°
Pavilion angle40.9°
OriginNatural
Grading LabHRD
CertificateHRD 220000154301
Dimensions6.67 × 6.74 × 4.31 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.67 mm6.74 mm1.23 ctJ / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateHRD 220000154301
Side View
Table 57.0%Crown 36.6°Girdle: MediumPavilion 40.9°Culet: NoneDepth 64.0%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £3,384 GBP|Low: £1,264 GBP|High: £3,384 GBP|Avg: £1,685 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 10£1,264 GBP
Retailer 11£1,280 GBP
Retailer 7£1,350 GBP
Retailer 5£1,387 GBP
Retailer 8£1,388 GBP
Retailer 3£1,397 GBP
Retailer 6£1,452 GBP
Retailer 9£1,601 GBP
Retailer 2£1,880 GBP
Retailer 4£2,424 GBP
NZ Jewellers£3,384 GBP

20 data points across 11 retailers

11 retailers£1,264 GBP to £3,384 GBP

B+
Cheapest Retailer
-
£1,264 GBP
B+
Retailer 2
-
£1,280 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,350 GBP
View
Retailer 4
-
£1,387 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£1,388 GBP
View
B+
Retailer 6
-
£1,397 GBP
View
B+
Retailer 7
-
£1,452 GBP
View
B+
Retailer 8
-
£1,601 GBP
View
B
Retailer 9
-
£1,880 GBP
View
B
Retailer 10
-
£2,424 GBP
View
Most Expensive
C
NZ Jewellers
5b8088a0-7d8e-4b3c-b1ca-b7368b401de1 · Nov 5
£3,384 GBP
$4,555 USD
View
10 more retailers have this diamond
Prices start from £1,264 GBPSave up to £2,120 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
£1,264 GBP