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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 1242005145

Certificate GIA 1242005145

Diamond specifications and retailer prices

From $3,920 SGD
As of November 6, 2026
Save $4,901 SGD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $10,514 SGD at NZ Jewellers · As of September 25, 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 1242005145. Listed at 16 retailers as of November 4, 2026, with a 125% 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1242005145
Dimensions7.02 × 7.91 × 4.55 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.02 mm7.91 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1242005145
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.5%

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: $4,538 SGD|Low: $3,855 SGD|High: $9,194 SGD|Avg: $5,732 SGD|-6.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12$3,920 SGD
Retailer 8$4,466 SGD
Retailer 1$4,538 SGD
Retailer 11$4,789 SGD
Retailer 3$4,793 SGD
Retailer 13$4,882 SGD
Retailer 6$4,944 SGD
Retailer 7$4,998 SGD
Retailer 5$5,211 SGD
Retailer 2$5,818 SGD
Retailer 9$6,455 SGD
Retailer 4$8,284 SGD
Retailer 10$8,821 SGD

28 data points across 13 retailers

16 retailers$3,920 SGD to $8,821 SGD

A
Cheapest Retailer
-
$3,920 SGD
A
Retailer 2
-
$4,466 SGD
View
A
Retailer 3
-
$4,538 SGD
View
A
Retailer 4
-
$4,789 SGD
View
A
Retailer 5
-
$4,793 SGD
View
A
Retailer 6
-
$4,882 SGD
View
Final sale: no returns
A
Retailer 7
-
$4,944 SGD
View
A
Retailer 8
-
$4,998 SGD
View
A
Retailer 9
-
$5,211 SGD
View
B+
Retailer 10
-
$5,818 SGD
View
Retailer 11
-
$5,916 SGD
View
Price last confirmed 28 days ago
B+
Retailer 12
-
$6,079 SGD
View
B+
Retailer 13
-
$6,455 SGD
View
B+
Retailer 14
-
$8,284 SGD
View
B
Retailer 15
-
$8,821 SGD
View
Most Expensive
NZ Jewellers
028c2f82-29df-442d-9e7a-e4c4f55a4700 · Sep 25
$10,514 SGD
$8,204 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from $3,920 SGDSave up to $4,901 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
$3,920 SGD