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Heart|Natural|GIA

0.90ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1553551358

Certificate GIA 1553551358

Diamond specifications and retailer prices

From $1,607 AUD
$1,126 USD
As of November 1, 2026
Save $2,656 AUD (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,352 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 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 1553551358. Listed at 15 retailers as of November 1, 2026, with a 165% 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553551358
Dimensions6.79 × 5.77 × 4.03 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Cavity, Needle, Indented Natural
Top View
6.79 mm5.77 mm0.90 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553551358
Side View
Table 64.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 59.3%

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: $5,352 AUD|Low: $1,530 AUD|High: $5,352 AUD|Avg: $2,680 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
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 6$1,607 AUD
Retailer 5$1,762 AUD
Retailer 3$1,835 AUD
Retailer 7$1,898 AUD
Retailer 4$1,988 AUD
Retailer 16$1,988 AUD
Retailer 15$2,293 AUD
Retailer 12$2,383 AUD
Retailer 13$2,383 AUD
Retailer 14$2,469 AUD
Retailer 8$2,729 AUD
Retailer 9$3,023 AUD
Retailer 11$3,267 AUD
Retailer 10$3,882 AUD
Retailer 2$4,263 AUD
NZ Jewellers$5,352 AUD

36 data points across 16 retailers

15 retailers$1,607 AUD to $4,263 AUD

A
Cheapest Retailer
-
$1,607 AUD
$1,126 USD
A
Retailer 2
-
$1,762 AUD
$1,235 USD
View
B+
Retailer 3
-
$1,898 AUD
$1,330 USD
View
Retailer 4
-
$1,988 AUD
$1,393 USD
View
Price last confirmed 13 days ago
Retailer 5
-
$2,079 AUD
$1,457 USD
View
Price last confirmed 16 days ago
Retailer 6
-
$2,293 AUD
$1,607 USD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
$2,383 AUD
$1,670 USD
View
B+
Retailer 8
-
$2,383 AUD
$1,670 USD
View
B
Retailer 9
-
$2,469 AUD
$1,730 USD
View
B+
Retailer 10
-
$2,729 AUD
$1,912 USD
View
B
Retailer 11
-
$3,023 AUD
€2,018 EUR
View
B
Retailer 12
-
$3,267 AUD
ZAR 36,992 ZAR
View
B
Retailer 13
-
$3,882 AUD
£2,142 GBP
View
B
Retailer 14
-
$4,263 AUD
£2,352 GBP
View
Most Expensive
NZ Jewellers
9d6be2f3-980b-4fc7-bfbf-4f350b0fe006 · Oct 21
$5,352 AUD
$3,751 USD
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $1,607 AUDSave up to $2,656 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
$1,607 AUD