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Heart|Natural|IGI

1.51ct H SI1 Heart Natural Diamond

VG • H/SI1 • IGI 803629091

Shape and cutting style on the report: Heart brilliant

Certificate IGI 803629091

Diamond specifications and retailer prices

From $4,462 SGD
$3,489 USD
As of October 31, 2026
Save $4,018 SGD (47%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $9,106 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629091. Listed at 18 retailers as of October 31, 2026, with a 90% 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

1.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle42.9°
OriginNatural
Grading LabIGI
CertificateIGI 803629091
Dimensions6.83 × 7.93 × 4.86 mm
L/W Ratio1.16
Girdle conditionFaceted
Top View
6.83 mm7.93 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629091
Side View
Table 61.0%Crown 33.3°Girdle: STK-THKPavilion 42.9°Culet: NoneDepth 61.3%

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: Oct 31
Current: $5,284 SGD|Low: $4,422 SGD|High: $8,845 SGD|Avg: $5,529 SGD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$4,462 SGD
Retailer 5$4,604 SGD
Retailer 10$4,681 SGD
Retailer 6$4,766 SGD
Retailer 9$4,859 SGD
Retailer 2$5,227 SGD
Retailer 3$5,259 SGD
Retailer 1$5,284 SGD
Retailer 7$6,233 SGD
Retailer 4$8,480 SGD

42 data points across 10 retailers

18 retailers$4,462 SGD to $8,480 SGD

A
Cheapest Retailer
-
$4,462 SGD
$3,489 USD
A
Retailer 2
-
$4,604 SGD
$3,600 USD
View
A
Retailer 3
-
$4,681 SGD
$3,660 USD
View
Final sale: no returns
A
Retailer 4
-
$4,766 SGD
$3,727 USD
View
A
Retailer 5
-
$4,859 SGD
$3,799 USD
View
Retailer 6
-
$5,227 SGD
$4,087 USD
View
Price last confirmed 49 days ago
Retailer 7
-
$5,227 SGD
$4,087 USD
View
Price last confirmed 32 days ago
Retailer 8
-
$5,227 SGD
$4,087 USD
View
Price last confirmed 32 days ago
Retailer 9
-
$5,227 SGD
$4,087 USD
View
Price last confirmed 17 days ago
B+
Retailer 10
-
$5,259 SGD
$4,112 USD
View
A
Retailer 11
-
$5,284 SGD
£3,253 GBP
View
Retailer 12
-
$6,030 SGD
$4,715 USD
View
Price last confirmed 57 days ago
Retailer 13
-
$6,030 SGD
$4,715 USD
View
Price last confirmed 34 days ago
Retailer 14
-
$6,030 SGD
$4,715 USD
View
Price last confirmed 48 days ago
B+
Retailer 15
-
$6,233 SGD
ZAR 78,737 ZAR
View
B
Retailer 16
-
$8,480 SGD
£5,221 GBP
View
Retailer 17
-
$9,106 SGD
$7,120 USD
View
Price last confirmed 45 days ago
Most Expensive
NZ Jewellers
bcaa560b-3e42-4350-9057-7c6607ea81b5 · Sep 30
$9,106 SGD
$7,120 USD
View
Price last confirmed 33 days ago
17 more retailers have this diamond
Prices start from $4,462 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
$4,462 SGD