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Round|Natural|GIA

1.23ct J IF Round Natural Diamond

EX • J/IF • GIA 1557801478

Certificate GIA 1557801478

Diamond specifications and retailer prices

From £2,997 GBP
A$6,178 AUD
As of October 31, 2026
9 retailers carry this diamond
Most expensive: £5,216 GBP at NZ Jewellers · As of October 6, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 1557801478. Listed at 9 retailers as of October 31, 2026. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
J
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1557801478
Dimensions6.75 × 6.81 × 4.25 mm
L/W Ratio1.01
Top View
6.75 mm6.81 mm1.23 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557801478
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £5,216 GBP|Low: £2,197 GBP|High: £5,265 GBP|Avg: £3,191 GBP|-0.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 7, 2026
Retailer 8£2,197 GBP
Retailer 10£2,669 GBP
Retailer 4£2,707 GBP
Retailer 9£2,791 GBP
Retailer 5£2,994 GBP
Retailer 3£2,997 GBP
Retailer 11£3,022 GBP
Retailer 6£3,269 GBP
Retailer 2£3,310 GBP
Retailer 7£5,067 GBP
NZ Jewellers£5,216 GBP

17 data points across 11 retailers

9 retailers

Retailer 1
-
£2,197 GBP
HK$23,000 HKD
Price last confirmed 21 days ago
Retailer 2
-
£2,669 GBP
$3,576 USD
View
Price last confirmed 12 days ago
Retailer 3
-
£2,707 GBP
View
Price last confirmed 25 days ago
Retailer 4
-
£2,791 GBP
SGD 5,053 SGD
View
Price last confirmed 25 days ago
Retailer 5
-
£2,994 GBP
$4,011 USD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£2,997 GBP
A$6,178 AUD
View
Retailer 7
-
£3,022 GBP
$4,049 USD
View
Price last confirmed 33 days ago
Retailer 8
-
£5,067 GBP
View
Price last confirmed 27 days ago
Most Expensive
NZ Jewellers
f286b7d2-b21d-4d38-a1c6-0baaf2cd7af2 · Oct 6
£5,216 GBP
$6,989 USD
View
Price last confirmed 26 days ago
8 more retailers have this diamond
Prices start from £2,997 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
£2,997 GBP