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Heart|Natural|GIA

1.51ct H SI2 Heart Natural Diamond

ID • H/SI2 • GIA 6555596845

Certificate GIA 6555596845

Diamond specifications and retailer prices

From $4,191 SGD
$3,277 USD
As of November 1, 2026
Save $4,018 SGD (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,813 SGD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555596845. Listed at 14 retailers as of November 1, 2026, with a 96% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.72°
Pavilion angle40.21°
OriginNatural
Grading LabGIA
CertificateGIA 6555596845
Dimensions7.95 × 7.20 × 4.51 mm
L/W Ratio1.10
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.95 mm7.20 mm1.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555596845
Side View
Table 58.0%Crown 35.72°Girdle: Very ThickPavilion 40.21°Culet: NoneDepth 56.7%

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 1
Current: $5,745 SGD|Low: $3,656 SGD|High: $8,563 SGD|Avg: $5,392 SGD|+3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$4,191 SGD
Retailer 6$4,357 SGD
Retailer 8$4,530 SGD
Retailer 5$4,625 SGD
Retailer 2$5,021 SGD
Retailer 9$5,059 SGD
Retailer 3$5,096 SGD
Retailer 1$5,745 SGD
Retailer 4$8,209 SGD

43 data points across 9 retailers

14 retailers$4,191 SGD to $8,209 SGD

A
Cheapest Retailer
-
$4,191 SGD
$3,277 USD
A
Retailer 2
-
$4,357 SGD
$3,407 USD
View
A
Retailer 3
-
$4,530 SGD
$3,542 USD
View
Final sale: no returns
A
Retailer 4
-
$4,625 SGD
$3,616 USD
View
A
Retailer 5
-
$5,021 SGD
£3,091 GBP
View
Retailer 6
-
$5,059 SGD
$3,956 USD
View
Price last confirmed 32 days ago
Retailer 7
-
$5,059 SGD
$3,956 USD
View
Price last confirmed 32 days ago
Retailer 8
-
$5,059 SGD
$3,956 USD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$5,096 SGD
$3,985 USD
View
B+
Retailer 10
-
$5,745 SGD
€4,278 EUR
View
Retailer 11
-
$5,837 SGD
$4,564 USD
View
Price last confirmed 56 days ago
Retailer 12
-
$5,837 SGD
$4,564 USD
View
Price last confirmed 34 days ago
B+
Retailer 13
-
$8,209 SGD
£5,054 GBP
View
Most Expensive
NZ Jewellers
2bd519f8-8648-43a3-bbdc-d59aafb399bf · Sep 30
$8,813 SGD
$6,891 USD
View
Price last confirmed 33 days ago
13 more retailers have this diamond
Prices start from $4,191 SGDSave up to $4,018 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
1.51ct Heart
$4,191 SGD