Heart|Natural|GIA

0.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 5231856783

Certificate GIA 5231856783

Diamond specifications and retailer prices

From $479 USD
As of November 5, 2026
Save $1,355 USD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,834 USD 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 $479 to $1,834, a $1,355 spread on the same certified stone. NZ Jewellers lists it at $1,834. 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
Color
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: $1,834 USD|Low: $479 USD|High: $1,834 USD|Avg: $754 USD
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$479 USD
Retailer 9$515 USD
Retailer 11$529 USD
Retailer 4$547 USD
Retailer 5$548 USD
Retailer 2$578 USD
Retailer 3$623 USD
Retailer 8$685 USD
Retailer 6$742 USD
Retailer 7$1,103 USD
NZ Jewellers$1,834 USD

45 data points across 11 retailers

11 retailers$479 USD to $1,834 USD

A
Cheapest Retailer
-
$479 USD
B+
Retailer 2
-
$515 USD
View
B+
Retailer 3
-
$547 USD
View
B+
Retailer 4
-
$548 USD
View
B+
Retailer 5
-
$578 USD
View
B
Retailer 6
-
$623 USD
View
B
Retailer 7
-
$648 USD
View
B
Retailer 8
-
$685 USD
View
B
Retailer 9
-
$742 USD
View
B
Retailer 10
-
$1,103 USD
View
Most Expensive
C
NZ Jewellers
31f6a0a0-52ac-48c8-8fcf-10c7aa63085e · Nov 5
$1,834 USD
View
10 more retailers have this diamond
Prices start from $479 USDSave up to $1,355 USD

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
$479 USD