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Heart|Natural|GIA

1.28ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1553609111

Certificate GIA 1553609111

Diamond specifications and retailer prices

From $2,511 SGD
As of November 6, 2026
Save $1,624 SGD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,376 SGD at NZ Jewellers · As of October 6, 2026
View at NZ Jewellers

About this 1.28ct natural heart diamond

This 1.28ct natural heart sits in the one-and-a-quarter to one-and-a-half 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 1553609111. Listed at 12 retailers as of November 6, 2026, with a 65% 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

1.28
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553609111
Dimensions6.72 × 7.53 × 4.41 mm
L/W Ratio1.12
Girdle conditionThick
Top View
6.72 mm7.53 mm1.28 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553609111
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 58.6%

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: $3,513 SGD|Low: $2,511 SGD|High: $6,254 SGD|Avg: $3,739 SGD|-5.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 5$2,511 SGD
Retailer 10$2,670 SGD
Retailer 9$2,981 SGD
Retailer 2$3,241 SGD
Retailer 4$3,294 SGD
Retailer 7$3,509 SGD
Retailer 1$3,513 SGD
Retailer 3$3,952 SGD
Retailer 8$4,064 SGD
Retailer 6$4,134 SGD
Retailer 11$6,120 SGD

32 data points across 11 retailers

12 retailers$2,511 SGD to $4,134 SGD

A
Cheapest Retailer
-
$2,511 SGD
A
Retailer 2
-
$2,670 SGD
View
Final sale: no returns
A
Retailer 3
-
$2,981 SGD
View
A
Retailer 4
-
$3,241 SGD
View
A
Retailer 5
-
$3,294 SGD
View
A
Retailer 6
-
$3,509 SGD
View
A
Retailer 7
-
$3,513 SGD
View
Retailer 8
-
$3,952 SGD
View
Price last confirmed 31 days ago
B+
Retailer 9
-
$4,064 SGD
View
B+
Retailer 10
-
$4,134 SGD
View
Retailer 11
-
$6,120 SGD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
54e56388-8c9f-41d1-b62b-9fec14c0741f · Oct 6
$7,376 SGD
$5,755 USD
View
Price last confirmed 31 days ago
11 more retailers have this diamond
Prices start from $2,511 SGDSave up to $1,624 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
1.28ct Heart
$2,511 SGD