CaratHunter
Plans
Heart|Natural|GIA

0.90ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6531902121

Certificate GIA 6531902121

Diamond specifications and retailer prices

From $1,658 AUD
HK$9,100 HKD
As of October 30, 2026
Save $1,144 AUD (41%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,596 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 E 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 6531902121. Listed at 15 retailers as of October 29, 2026, with a 69% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle37.9°
OriginNatural
Grading LabGIA
CertificateGIA 6531902121
Dimensions5.68 × 6.64 × 3.96 mm
L/W Ratio1.17
Top View
5.68 mm6.64 mm0.90 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531902121
Side View
Table 58.0%CrownGirdle: MED-THKPavilion 37.9°Culet: NoneDepth 59.6%

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: Oct 30
Current: $2,155 AUD|Low: $1,604 AUD|High: $4,025 AUD|Avg: $2,530 AUD|-11.9%
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
October 30, 2026
Retailer 8$1,658 AUD
Retailer 6$2,005 AUD
Retailer 12$2,016 AUD
Retailer 7$2,031 AUD
Retailer 1$2,155 AUD
Retailer 10$2,207 AUD
Retailer 2$2,313 AUD
Retailer 11$2,317 AUD
Retailer 13$2,501 AUD
Retailer 4$2,852 AUD
Retailer 5$3,092 AUD
Retailer 9$3,315 AUD
Retailer 3$3,864 AUD

34 data points across 13 retailers

15 retailers$1,658 AUD to $2,802 AUD

A
Cheapest Retailer
-
$1,658 AUD
HK$9,100 HKD
A
Retailer 2
-
$2,005 AUD
€1,341 EUR
View
A
Retailer 3
-
$2,016 AUD
$1,416 USD
View
Final sale: no returns
A
Retailer 4
-
$2,031 AUD
$1,427 USD
View
A
Retailer 5
-
$2,034 AUD
$1,429 USD
View
A
Retailer 6
-
$2,155 AUD
£1,192 GBP
View
B+
Retailer 7
-
$2,207 AUD
$1,550 USD
View
Retailer 8
-
$2,317 AUD
SGD 2,199 SGD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$2,501 AUD
SGD 2,374 SGD
View
B+
Retailer 10
-
$2,802 AUD
View
Retailer 11
-
$2,852 AUD
View
Price last confirmed 25 days ago
Retailer 12
-
$3,092 AUD
ZAR 35,084 ZAR
View
Price last confirmed 26 days ago
B+
Retailer 13
-
$3,315 AUD
$2,328 USD
View
Price last confirmed 7 days ago
Retailer 14
-
$3,864 AUD
£2,137 GBP
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
73da8a21-f709-44d2-ae13-d586207141f0 · Sep 25
$5,596 AUD
$3,931 USD
View
Price last confirmed 35 days ago
14 more retailers have this diamond
Prices start from $1,658 AUDSave up to $1,144 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
$1,658 AUD