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Heart|Natural|GIA

1.23ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6532310035

Certificate GIA 6532310035

Diamond specifications and retailer prices

From £1,392 GBP
As of November 2, 2026
Save £2,042 GBP (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,434 GBP at NZ Jewellers · As of November 3, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6532310035. Listed at 5 retailers as of November 2, 2026, with prices from £1,392 to £3,434, a £2,042 spread on the same certified stone. NZ Jewellers lists it at £3,434. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.43°
Pavilion angle41.77°
OriginNatural
Grading LabGIA
CertificateGIA 6532310035
Dimensions6.39 × 7.53 × 4.55 mm
L/W Ratio1.18
Top View
6.39 mm7.53 mm1.23 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6532310035
Side View
Table 59.0%Crown 36.43°GirdlePavilion 41.77°CuletDepth 60.4%

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 2
Current: £3,434 GBP|Low: £1,392 GBP|High: £3,511 GBP|Avg: £1,949 GBP|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 2£1,392 GBP
Retailer 5£1,408 GBP
Retailer 4£1,473 GBP
Retailer 7£1,654 GBP
Retailer 6£1,682 GBP
Retailer 8£1,868 GBP
Retailer 3£2,467 GBP
NZ Jewellers£3,434 GBP

26 data points across 8 retailers

5 retailers£1,392 GBP to £3,434 GBP

A
Cheapest Retailer
-
£1,392 GBP
A
Retailer 2
-
£1,408 GBP
View
A
Retailer 3
-
£1,473 GBP
View
B
Retailer 4
-
£2,467 GBP
View
Most Expensive
B
NZ Jewellers
7fd7a8d8-743f-475e-ac9f-8c92ae388d23 · Nov 3
£3,434 GBP
$4,596 USD
View
4 more retailers have this diamond
Prices start from £1,392 GBPSave up to £2,042 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
£1,392 GBP