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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 $697 AUD
As of November 5, 2026
Save $1,972 AUD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,669 AUD 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 $697 to $2,669, a $1,972 spread on the same certified stone. NZ Jewellers lists it at $2,669. 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: $2,669 AUD|Low: $697 AUD|High: $2,669 AUD|Avg: $1,097 AUD
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$697 AUD
Retailer 9$750 AUD
Retailer 11$770 AUD
Retailer 4$796 AUD
Retailer 5$798 AUD
Retailer 2$841 AUD
Retailer 3$907 AUD
Retailer 8$997 AUD
Retailer 6$1,080 AUD
Retailer 7$1,605 AUD
NZ Jewellers$2,669 AUD

44 data points across 11 retailers

11 retailers$697 AUD to $2,669 AUD

A
Cheapest Retailer
-
$697 AUD
B+
Retailer 2
-
$750 AUD
View
B+
Retailer 3
-
$796 AUD
View
B+
Retailer 4
-
$798 AUD
View
B+
Retailer 5
-
$841 AUD
View
B
Retailer 6
-
$907 AUD
View
B
Retailer 7
-
$943 AUD
View
B
Retailer 8
-
$997 AUD
View
B
Retailer 9
-
$1,080 AUD
View
B
Retailer 10
-
$1,605 AUD
View
Most Expensive
C
NZ Jewellers
31f6a0a0-52ac-48c8-8fcf-10c7aa63085e · Nov 5
$2,669 AUD
$1,834 USD
View
10 more retailers have this diamond
Prices start from $697 AUDSave up to $1,972 AUD

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
$697 AUD