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1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2556885249

Certificate GIA 2556885249

Diamond specifications and retailer prices

From £1,162 GBP
As of November 5, 2026
Save £1,022 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,184 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

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 top-tier cut grade and certified by GIA 2556885249. Listed at 9 retailers as of November 4, 2026, with prices from £1,162 to £2,184, a £1,022 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,184. 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

1.23
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556885249
Dimensions6.80 × 4.26 × 4.26 mm
L/W Ratio1.60
Culet sizeNone
Top View
6.80 mm4.26 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556885249
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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 5
Current: £1,162 GBP|Low: £1,156 GBP|High: £2,383 GBP|Avg: £1,660 GBP|-7.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,162 GBP
Retailer 7£1,263 GBP
Retailer 8£1,350 GBP
Retailer 3£1,450 GBP
Retailer 6£1,453 GBP
Retailer 4£1,698 GBP
Retailer 5£1,725 GBP
Retailer 2£1,864 GBP
Wholesale Diamonds Direct£2,184 GBP

39 data points across 9 retailers

9 retailers£1,162 GBP to £2,184 GBP

A
Cheapest Retailer
-
£1,162 GBP
A
Retailer 2
-
£1,263 GBP
View
A
Retailer 3
-
£1,350 GBP
View
A
Retailer 4
-
£1,450 GBP
View
A
Retailer 5
-
£1,453 GBP
View
B+
Retailer 6
-
£1,698 GBP
View
B+
Retailer 7
-
£1,725 GBP
View
B+
Retailer 8
-
£1,864 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
570868291 · Nov 4
£2,184 GBP
$2,939 USD
View
8 more retailers have this diamond
Prices start from £1,162 GBPSave up to £1,022 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
1.23ct Round
£1,162 GBP