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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1535629313

Certificate GIA 1535629313

Diamond specifications and retailer prices

From $4,461 SGD
As of November 6, 2026
Save $4,805 SGD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,336 SGD at NZ Jewellers · As of October 18, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1535629313. Listed at 19 retailers as of November 4, 2026, with a 108% 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1535629313
Dimensions7.99 × 7.02 × 4.65 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.99 mm7.02 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1535629313
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.2%

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: $4,738 SGD|Low: $4,445 SGD|High: $9,563 SGD|Avg: $5,997 SGD|-3.4%
Retailer 1
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$4,461 SGD
Retailer 1$4,738 SGD
Retailer 7$5,317 SGD
Retailer 2$5,384 SGD
Retailer 4$5,671 SGD
Retailer 5$5,908 SGD
Retailer 9$5,985 SGD
Retailer 3$6,020 SGD
Retailer 11$6,025 SGD
Retailer 6$7,117 SGD
Retailer 8$9,266 SGD

33 data points across 11 retailers

19 retailers$4,461 SGD to $9,266 SGD

A
Cheapest Retailer
-
$4,461 SGD
A
Retailer 2
-
$4,738 SGD
View
A
Retailer 3
-
$5,317 SGD
View
A
Retailer 4
-
$5,384 SGD
View
Final sale: no returns
B+
Retailer 5
-
$5,499 SGD
View
B+
Retailer 6
-
$5,504 SGD
View
B+
Retailer 7
-
$5,671 SGD
View
B+
Retailer 8
-
$5,821 SGD
View
B+
Retailer 9
-
$5,908 SGD
View
Retailer 10
-
$5,933 SGD
View
Price last confirmed 21 days ago
Retailer 11
-
$5,933 SGD
View
Price last confirmed 21 days ago
Retailer 12
-
$5,933 SGD
View
Price last confirmed 19 days ago
B+
Retailer 13
-
$5,985 SGD
View
Retailer 14
-
$6,020 SGD
View
Price last confirmed 28 days ago
B+
Retailer 15
-
$6,025 SGD
View
Retailer 16
-
$6,846 SGD
View
Price last confirmed 18 days ago
B+
Retailer 17
-
$7,117 SGD
View
B
Retailer 18
-
$9,266 SGD
View
Most Expensive
NZ Jewellers
a8878e84-ef46-4992-b67a-8eceeb60932b · Oct 18
$10,336 SGD
$8,065 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from $4,461 SGDSave up to $4,805 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
$4,461 SGD