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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6545059504

Certificate GIA 6545059504

Diamond specifications and retailer prices

From $4,347 SGD
As of November 6, 2026
Save $4,765 SGD (52%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,063 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 6545059504. Listed at 17 retailers as of November 4, 2026, with a 110% 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 6545059504
Dimensions7.10 × 8.01 × 4.70 mm
L/W Ratio1.13
Top View
7.10 mm8.01 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6545059504
Side View
Table 63.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 58.7%

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 6
Current: $10,063 SGD|Low: $4,331 SGD|High: $10,063 SGD|Avg: $6,236 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10$4,347 SGD
Retailer 8$4,475 SGD
Retailer 2$4,615 SGD
Retailer 5$5,519 SGD
Retailer 3$5,776 SGD
Retailer 6$5,811 SGD
Retailer 4$5,862 SGD
Retailer 11$5,927 SGD
Retailer 12$6,664 SGD
Retailer 7$6,999 SGD
Retailer 9$9,112 SGD
NZ Jewellers$10,063 SGD

38 data points across 12 retailers

17 retailers$4,347 SGD to $9,112 SGD

A
Cheapest Retailer
-
$4,347 SGD
A
Retailer 2
-
$4,475 SGD
View
A
Retailer 3
-
$4,615 SGD
View
A
Retailer 4
-
$5,352 SGD
View
A
Retailer 5
-
$5,357 SGD
View
A
Retailer 6
-
$5,519 SGD
View
B+
Retailer 7
-
$5,671 SGD
View
Retailer 8
-
$5,776 SGD
View
Price last confirmed 21 days ago
Retailer 9
-
$5,776 SGD
View
Price last confirmed 19 days ago
Retailer 10
-
$5,776 SGD
View
Price last confirmed 21 days ago
A
Retailer 11
-
$5,811 SGD
View
Retailer 12
-
$5,862 SGD
View
Price last confirmed 28 days ago
B+
Retailer 13
-
$5,927 SGD
View
Retailer 14
-
$6,664 SGD
View
Price last confirmed 18 days ago
B+
Retailer 15
-
$6,999 SGD
View
B
Retailer 16
-
$9,112 SGD
View
Most Expensive
NZ Jewellers
29995b69-3b95-4f88-9472-791e51011cc6 · Oct 18
$10,063 SGD
$7,852 USD
View
Price last confirmed 19 days ago
16 more retailers have this diamond
Prices start from $4,347 SGDSave up to $4,765 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
$4,347 SGD