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Heart|Natural|GIA

1.23ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 6561386466

Certificate GIA 6561386466

Diamond specifications and retailer prices

From £2,380 GBP
As of November 6, 2026
Save £2,111 GBP (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £4,491 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6561386466. Listed at 5 retailers as of November 5, 2026, with prices from £2,380 to £4,491, a £2,111 spread on the same certified stone. NZ Jewellers lists it at £4,491. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6561386466
Dimensions6.67 × 7.56 × 4.09 mm
L/W Ratio1.13
Key to symbols
Crystal, Feather, Needle
Top View
6.67 mm7.56 mm1.23 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6561386466
Side View
Table 54.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 54.1%

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 6
Current: £4,491 GBP|Low: £2,043 GBP|High: £4,496 GBP|Avg: £3,228 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£2,380 GBP
Retailer 5£2,488 GBP
Retailer 3£2,501 GBP
Retailer 4£4,299 GBP
NZ Jewellers£4,491 GBP

34 data points across 5 retailers

5 retailers£2,380 GBP to £4,491 GBP

B+
Cheapest Retailer
-
£2,380 GBP
Final sale: no returns
B+
Retailer 2
-
£2,488 GBP
View
B+
Retailer 3
-
£2,501 GBP
View
B
Retailer 4
-
£4,299 GBP
View
Most Expensive
B
NZ Jewellers
5c9e04d2-03eb-425e-a8c7-be5f950f35cb · Nov 5
£4,491 GBP
$6,011 USD
View
4 more retailers have this diamond
Prices start from £2,380 GBPSave up to £2,111 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 Heart
£2,380 GBP