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Heart|Natural|GIA

1.23ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 1246072305

Certificate GIA 1246072305

Diamond specifications and retailer prices

From €1,135 EUR
As of November 6, 2026
Save €2,631 EUR (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €3,765 EUR 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1246072305. Listed at 11 retailers as of November 5, 2026, with prices from €1,135 to €3,765, a €2,631 spread on the same certified stone. NZ Jewellers lists it at €3,765. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
Pavilion angle38.99°
OriginNatural
Grading LabGIA
CertificateGIA 1246072305
Dimensions6.30 × 7.36 × 4.39 mm
L/W Ratio1.17
Key to symbols
Feather, Twinning Wisp
Top View
6.30 mm7.36 mm1.23 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1246072305
Side View
Table 61.0%CrownGirdle: STK-VTKPavilion 38.99°Culet: NoneDepth 59.7%

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 6
Current: €3,765 EUR|Low: €1,135 EUR|High: €4,036 EUR|Avg: €2,028 EUR|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11€1,135 EUR
Retailer 10€1,459 EUR
Retailer 8€1,543 EUR
Retailer 4€1,575 EUR
Retailer 2€1,579 EUR
Retailer 7€1,615 EUR
Retailer 3€1,713 EUR
Retailer 6€1,820 EUR
Retailer 5€2,370 EUR
Retailer 9€2,705 EUR
NZ Jewellers€3,765 EUR

30 data points across 11 retailers

11 retailers€1,135 EUR to €3,765 EUR

A
Cheapest Retailer
-
€1,135 EUR
B+
Retailer 2
-
€1,459 EUR
View
A
Retailer 3
-
€1,543 EUR
View
B+
Retailer 4
-
€1,575 EUR
View
B+
Retailer 5
-
€1,579 EUR
View
B+
Retailer 6
-
€1,615 EUR
View
B+
Retailer 7
-
€1,713 EUR
View
B+
Retailer 8
-
€1,820 EUR
View
B+
Retailer 9
-
€2,370 EUR
View
B
Retailer 10
-
€2,705 EUR
View
Most Expensive
B
NZ Jewellers
fdde17d1-cee7-4b88-852b-47df3ef7bc74 · Nov 5
€3,765 EUR
$4,204 USD
View
10 more retailers have this diamond
Prices start from €1,135 EURSave up to €2,631 EUR

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
€1,135 EUR