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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 $864 NZD
As of November 5, 2026
Save $2,444 NZD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,308 NZD 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 $864 to $3,308, a $2,444 spread on the same certified stone. NZ Jewellers lists it at $3,308. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,308 NZD|Low: $864 NZD|High: $3,308 NZD|Avg: $1,359 NZD
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$864 NZD
Retailer 9$929 NZD
Retailer 11$954 NZD
Retailer 4$987 NZD
Retailer 5$989 NZD
Retailer 2$1,043 NZD
Retailer 3$1,124 NZD
Retailer 8$1,236 NZD
Retailer 6$1,338 NZD
Retailer 7$1,990 NZD
NZ Jewellers$3,308 NZD

44 data points across 11 retailers

11 retailers$864 NZD to $3,308 NZD

A
Cheapest Retailer
-
$864 NZD
B+
Retailer 2
-
$929 NZD
View
B+
Retailer 3
-
$987 NZD
View
B+
Retailer 4
-
$989 NZD
View
B+
Retailer 5
-
$1,043 NZD
View
B
Retailer 6
-
$1,124 NZD
View
B
Retailer 7
-
$1,169 NZD
View
B
Retailer 8
-
$1,236 NZD
View
B
Retailer 9
-
$1,338 NZD
View
B
Retailer 10
-
$1,990 NZD
View
Most Expensive
C
NZ Jewellers
31f6a0a0-52ac-48c8-8fcf-10c7aa63085e · Nov 5
$3,308 NZD
$1,834 USD
View
10 more retailers have this diamond
Prices start from $864 NZDSave up to $2,444 NZD

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
$864 NZD