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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2556551330

Certificate GIA 2556551330

Diamond specifications and retailer prices

From $1,530 AUD
As of November 6, 2026
Save $888 AUD (37%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,144 AUD at NZ Jewellers · As of September 30, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556551330. Listed at 10 retailers as of November 4, 2026, with a 58% 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2556551330
Dimensions6.50 × 5.87 × 3.82 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Indented Natural
Top View
6.50 mm5.87 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2556551330
Side View
Table 58.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 58.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,850 AUD|Low: $1,322 AUD|High: $2,448 AUD|Avg: $1,765 AUD|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$1,322 AUD
Retailer 2$1,530 AUD
Retailer 5$1,550 AUD
Retailer 1$1,850 AUD
Retailer 3$1,934 AUD
Retailer 4$2,417 AUD

45 data points across 6 retailers

10 retailers$1,530 AUD to $2,417 AUD

Retailer 1
-
$1,322 AUD
Price last confirmed 36 days ago
Retailer 2
-
$1,322 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$1,372 AUD
View
Price last confirmed 36 days ago
Retailer 4
-
$1,524 AUD
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$1,530 AUD
View
B+
Retailer 6
-
$1,550 AUD
View
B+
Retailer 7
-
$1,850 AUD
View
B+
Retailer 8
-
$1,934 AUD
View
B
Retailer 9
-
$2,417 AUD
View
Most Expensive
NZ Jewellers
87bcb237-9209-4761-a008-a29bb5d50812 · Sep 30
$4,144 AUD
$2,847 USD
View
Price last confirmed 37 days ago
9 more retailers have this diamond
Prices start from $1,530 AUDSave up to $888 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.

B+
0.90ct Heart
$1,530 AUD