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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 $3,534 NZD
As of November 6, 2026
Save $4,632 NZD (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,381 NZD 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 131% 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $8,166 NZD|Low: $3,534 NZD|High: $8,803 NZD|Avg: $5,262 NZD|-7.2%
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 6$3,534 NZD
Retailer 11$3,758 NZD
Retailer 10$4,196 NZD
Retailer 2$4,562 NZD
Retailer 5$4,636 NZD
Retailer 8$4,939 NZD
Retailer 4$4,944 NZD
Retailer 3$5,563 NZD
Retailer 9$5,720 NZD
Retailer 7$5,819 NZD
Retailer 1$8,166 NZD

32 data points across 11 retailers

12 retailers$3,534 NZD to $8,166 NZD

A
Cheapest Retailer
-
$3,534 NZD
A
Retailer 2
-
$3,758 NZD
View
Final sale: no returns
A
Retailer 3
-
$4,196 NZD
View
A
Retailer 4
-
$4,562 NZD
View
A
Retailer 5
-
$4,636 NZD
View
A
Retailer 6
-
$4,939 NZD
View
A
Retailer 7
-
$4,944 NZD
View
Retailer 8
-
$5,563 NZD
View
Price last confirmed 31 days ago
B+
Retailer 9
-
$5,720 NZD
View
B+
Retailer 10
-
$5,819 NZD
View
Retailer 11
-
$8,166 NZD
View
Most Expensive
NZ Jewellers
54e56388-8c9f-41d1-b62b-9fec14c0741f · Oct 6
$10,381 NZD
$5,755 USD
View
Price last confirmed 31 days ago
11 more retailers have this diamond
Prices start from $3,534 NZDSave up to $4,632 NZD

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
$3,534 NZD