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Heart|Natural|GIA

0.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 5231856783

Certificate GIA 5231856783

Diamond specifications and retailer prices

From €429 EUR
As of November 5, 2026
Save €1,214 EUR (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,643 EUR at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231856783. Listed at 11 retailers as of November 5, 2026, with prices from €429 to €1,643, a €1,214 spread on the same certified stone. NZ Jewellers lists it at €1,643. 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

0.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5231856783
Dimensions4.69 × 5.47 × 3.40 mm
L/W Ratio1.17
Top View
4.69 mm5.47 mm0.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceMedium
CertificateGIA 5231856783
Side View
Table 55.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: €1,643 EUR|Low: €429 EUR|High: €1,643 EUR|Avg: €675 EUR
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 10€429 EUR
Retailer 9€461 EUR
Retailer 11€474 EUR
Retailer 4€490 EUR
Retailer 5€491 EUR
Retailer 2€518 EUR
Retailer 3€558 EUR
Retailer 8€614 EUR
Retailer 6€665 EUR
Retailer 7€988 EUR
NZ Jewellers€1,643 EUR

44 data points across 11 retailers

11 retailers€429 EUR to €1,643 EUR

A
Cheapest Retailer
-
€429 EUR
B+
Retailer 2
-
€461 EUR
View
B+
Retailer 3
-
€490 EUR
View
B+
Retailer 4
-
€491 EUR
View
B+
Retailer 5
-
€518 EUR
View
B
Retailer 6
-
€558 EUR
View
B
Retailer 7
-
€580 EUR
View
B
Retailer 8
-
€614 EUR
View
B
Retailer 9
-
€665 EUR
View
B
Retailer 10
-
€988 EUR
View
Most Expensive
C
NZ Jewellers
31f6a0a0-52ac-48c8-8fcf-10c7aa63085e · Nov 5
€1,643 EUR
$1,834 USD
View
10 more retailers have this diamond
Prices start from €429 EURSave up to €1,214 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
0.51ct Heart
€429 EUR