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Heart|Natural|GIA

0.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 6515727921

Certificate GIA 6515727921

Diamond specifications and retailer prices

From $648 SGD
As of November 6, 2026
Save $1,137 SGD (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,424 SGD 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,424 SGD|Low: $648 SGD|High: $3,082 SGD|Avg: $1,059 SGD|-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$648 SGD
Retailer 4$692 SGD
Retailer 7$713 SGD
Retailer 12$747 SGD
Retailer 5$773 SGD
Retailer 9$832 SGD
Retailer 17$832 SGD
Retailer 19$892 SGD
Retailer 13$939 SGD
Retailer 6$941 SGD
Retailer 2$943 SGD
Retailer 8$948 SGD
Retailer 16$968 SGD
Retailer 3$1,019 SGD
Retailer 10$1,070 SGD
Retailer 14$1,192 SGD
Retailer 11$1,361 SGD
Retailer 15$1,785 SGD
NZ Jewellers$2,424 SGD

22 data points across 19 retailers

18 retailers$648 SGD to $1,785 SGD

A
Cheapest Retailer
-
$648 SGD
B+
Retailer 2
-
$692 SGD
View
B+
Retailer 3
-
$713 SGD
View
Final sale: no returns
B+
Retailer 4
-
$747 SGD
View
B+
Retailer 5
-
$773 SGD
View
Retailer 6
-
$832 SGD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$832 SGD
View
B+
Retailer 8
-
$892 SGD
View
B
Retailer 9
-
$939 SGD
View
B
Retailer 10
-
$941 SGD
View
B+
Retailer 11
-
$943 SGD
View
B
Retailer 12
-
$948 SGD
View
B
Retailer 13
-
$968 SGD
View
B
Retailer 14
-
$1,019 SGD
View
B
Retailer 15
-
$1,070 SGD
View
B
Retailer 16
-
$1,192 SGD
View
B
Retailer 17
-
$1,785 SGD
View
Most Expensive
NZ Jewellers
94ee7a14-1ad9-4429-8ee3-e09098f90f44 · Nov 5
$2,424 SGD
$1,891 USD
View
Price under review
17 more retailers have this diamond
Prices start from $648 SGDSave up to $1,137 SGD

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
$648 SGD