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Heart|Natural|GIA

1.23ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 7548245104

Certificate GIA 7548245104

Diamond specifications and retailer prices

From £1,637 GBP
As of November 5, 2026
Save £2,289 GBP (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,926 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 7548245104. Listed at 7 retailers as of November 5, 2026, with prices from £1,637 to £3,926, a £2,289 spread on the same certified stone. NZ Jewellers lists it at £3,926. 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
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 7548245104
Dimensions7.29 × 6.43 × 4.54 mm
L/W Ratio1.13
Key to symbols
Twinning Wisp, Crystal, Feather, Cloud
Top View
7.29 mm6.43 mm1.23 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 7548245104
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NDepth 62.4%

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: £3,926 GBP|Low: £1,483 GBP|High: £4,136 GBP|Avg: £2,186 GBP|-5.1%
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 2£1,637 GBP
Retailer 3£1,712 GBP
Retailer 8£1,780 GBP
Retailer 5£1,878 GBP
Retailer 11£1,936 GBP
Retailer 7£1,937 GBP
Retailer 4£1,965 GBP
Retailer 9£1,987 GBP
Retailer 10£2,079 GBP
Retailer 6£3,115 GBP
NZ Jewellers£3,926 GBP

30 data points across 11 retailers

7 retailers£1,637 GBP to £3,926 GBP

A
Cheapest Retailer
-
£1,637 GBP
B+
Retailer 2
-
£1,780 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,878 GBP
View
B+
Retailer 4
-
£1,937 GBP
View
B+
Retailer 5
-
£1,965 GBP
View
B
Retailer 6
-
£3,115 GBP
View
Most Expensive
C
NZ Jewellers
9e69e80b-a984-4519-9a61-44ddce4122d7 · Nov 5
£3,926 GBP
$5,255 USD
View
6 more retailers have this diamond
Prices start from £1,637 GBPSave up to £2,289 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 Heart
£1,637 GBP