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Heart|Natural|GIA

0.90ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 1537300520

Certificate GIA 1537300520

Diamond specifications and retailer prices

From $1,421 AUD
HK$7,800 HKD
As of November 1, 2026
Save $1,168 AUD (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,452 AUD at NZ Jewellers · As of September 25, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1537300520. Listed at 14 retailers as of November 1, 2026, with a 82% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 1537300520
Dimensions6.81 × 5.79 × 3.41 mm
L/W Ratio1.18
Girdle conditionFaceted
Top View
6.81 mm5.79 mm0.90 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1537300520
Side View
Table 60.0%CrownGirdle: STK-THKPavilion 40.4°Culet: NoneDepth 58.9%

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: $1,846 AUD|Low: $1,421 AUD|High: $3,959 AUD|Avg: $2,319 AUD|-8.6%
Retailer 1
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 7$1,421 AUD
Retailer 8$1,740 AUD
Retailer 6$1,824 AUD
Retailer 1$1,846 AUD
Retailer 10$1,876 AUD
Retailer 9$1,893 AUD
Retailer 13$1,910 AUD
Retailer 12$2,045 AUD
Retailer 2$2,207 AUD
Retailer 4$2,614 AUD
Retailer 5$2,940 AUD
Retailer 11$2,947 AUD
Retailer 3$3,661 AUD

34 data points across 13 retailers

14 retailers$1,421 AUD to $2,589 AUD

A
Cheapest Retailer
-
$1,421 AUD
HK$7,800 HKD
A
Retailer 2
-
$1,740 AUD
€1,164 EUR
View
A
Retailer 3
-
$1,824 AUD
$1,281 USD
View
A
Retailer 4
-
$1,846 AUD
£1,021 GBP
View
A
Retailer 5
-
$1,876 AUD
$1,318 USD
View
A
Retailer 6
-
$1,893 AUD
$1,330 USD
View
A
Retailer 7
-
$1,910 AUD
$1,342 USD
View
Final sale: no returns
Retailer 8
-
$2,045 AUD
SGD 1,941 SGD
View
Price last confirmed 10 days ago
B+
Retailer 9
-
$2,589 AUD
View
Retailer 10
-
$2,614 AUD
View
Price last confirmed 27 days ago
Retailer 11
-
$2,940 AUD
ZAR 33,363 ZAR
View
Price last confirmed 28 days ago
Retailer 12
-
$2,947 AUD
$2,070 USD
View
Price last confirmed 9 days ago
Retailer 13
-
$3,661 AUD
£2,025 GBP
View
Price last confirmed 25 days ago
Most Expensive
NZ Jewellers
d776dcc4-55cf-459f-b584-3a39876f34cc · Sep 25
$5,452 AUD
$3,830 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from $1,421 AUDSave up to $1,168 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
$1,421 AUD