Heart|Natural|GIA

0.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 6515727921

Certificate GIA 6515727921

Diamond specifications and retailer prices

From $506 USD
As of November 6, 2026
Save $887 USD (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,891 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6515727921. Listed at 18 retailers as of November 2, 2026, with a 175% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
G
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle37.8°
OriginNatural
Grading LabGIA
CertificateGIA 6515727921
Dimensions5.69 × 5.07 × 2.76 mm
L/W Ratio1.12
Top View
5.69 mm5.07 mm0.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6515727921
Side View
Table 56.0%Crown 36.4°Girdle: STK-THKPavilion 37.8°Culet: NoneDepth 54.5%

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 6
Current: $1,891 USD|Low: $506 USD|High: $2,405 USD|Avg: $826 USD|-21.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 18$506 USD
Retailer 4$540 USD
Retailer 7$556 USD
Retailer 12$583 USD
Retailer 5$603 USD
Retailer 9$649 USD
Retailer 17$649 USD
Retailer 19$696 USD
Retailer 13$733 USD
Retailer 6$734 USD
Retailer 2$736 USD
Retailer 8$740 USD
Retailer 16$755 USD
Retailer 3$795 USD
Retailer 10$835 USD
Retailer 14$930 USD
Retailer 11$1,062 USD
Retailer 15$1,393 USD
NZ Jewellers$1,891 USD

22 data points across 19 retailers

18 retailers$506 USD to $1,393 USD

A
Cheapest Retailer
-
$506 USD
B+
Retailer 2
-
$540 USD
View
B+
Retailer 3
-
$556 USD
View
Final sale: no returns
B+
Retailer 4
-
$583 USD
View
B+
Retailer 5
-
$603 USD
View
Retailer 6
-
$649 USD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$649 USD
View
B+
Retailer 8
-
$696 USD
View
B
Retailer 9
-
$733 USD
View
B
Retailer 10
-
$734 USD
View
B+
Retailer 11
-
$736 USD
View
B
Retailer 12
-
$740 USD
View
B
Retailer 13
-
$755 USD
View
B
Retailer 14
-
$795 USD
View
B
Retailer 15
-
$835 USD
View
B
Retailer 16
-
$930 USD
View
B
Retailer 17
-
$1,393 USD
View
Most Expensive
NZ Jewellers
94ee7a14-1ad9-4429-8ee3-e09098f90f44 · Nov 5
$1,891 USD
View
Price under review
17 more retailers have this diamond
Prices start from $506 USDSave up to $887 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
$506 USD