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Heart|Natural|GIA

0.90ct H SI1 Heart Natural Diamond

ID • H/SI1 • GIA 1553181188

Certificate GIA 1553181188

Diamond specifications and retailer prices

From $1,384 AUD
$972 USD
As of November 1, 2026
Save $2,177 AUD (61%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,470 AUD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded H 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 1553181188. Listed at 15 retailers as of November 1, 2026, with a 157% 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

0.90
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553181188
Dimensions6.66 × 5.72 × 4.01 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Needle, Indented Natural
Top View
6.66 mm5.72 mm0.90 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553181188
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 60.3%

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 1
Current: $4,470 AUD|Low: $1,516 AUD|High: $4,470 AUD|Avg: $2,353 AUD
NZ Jewellers
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 2, 2026
Retailer 3$1,516 AUD
Retailer 5$1,552 AUD
Retailer 9$1,660 AUD
Retailer 13$1,660 AUD
Retailer 11$1,724 AUD
Retailer 10$1,916 AUD
Retailer 4$2,007 AUD
Retailer 12$2,210 AUD
Retailer 6$2,583 AUD
Retailer 7$2,710 AUD
Retailer 8$3,408 AUD
Retailer 2$3,561 AUD
NZ Jewellers$4,470 AUD

39 data points across 13 retailers

15 retailers$1,384 AUD to $3,561 AUD

A
Cheapest Retailer
-
$1,384 AUD
$972 USD
A
Retailer 2
-
$1,516 AUD
$1,065 USD
View
A
Retailer 3
-
$1,552 AUD
$1,090 USD
View
Retailer 4
-
$1,660 AUD
$1,166 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$1,724 AUD
$1,211 USD
View
Price last confirmed 10 days ago
Retailer 6
-
$1,916 AUD
$1,346 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$2,007 AUD
$1,410 USD
View
B+
Retailer 8
-
$2,007 AUD
$1,410 USD
View
B+
Retailer 9
-
$2,078 AUD
$1,460 USD
View
Retailer 10
-
$2,210 AUD
£1,222 GBP
View
Price last confirmed 36 days ago
B+
Retailer 11
-
$2,583 AUD
€1,728 EUR
View
B+
Retailer 12
-
$2,710 AUD
ZAR 30,756 ZAR
View
B
Retailer 13
-
$3,408 AUD
£1,885 GBP
View
B
Retailer 14
-
$3,561 AUD
£1,969 GBP
View
Most Expensive
NZ Jewellers
f573e1a2-dde6-4659-83aa-2f1f2cf0e659 · Oct 21
$4,470 AUD
$3,140 USD
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $1,384 AUDSave up to $2,177 AUD

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
0.90ct Heart
$1,384 AUD