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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1555246897

Certificate GIA 1555246897

Diamond specifications and retailer prices

From $2,806 AUD
HK$15,400 HKD
As of October 31, 2026
Save $3,672 AUD (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,958 AUD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555246897. Listed at 21 retailers as of October 25, 2026, with a 131% 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1555246897
Dimensions6.30 × 6.35 × 4.01 mm
L/W Ratio1.01
Top View
6.30 mm6.35 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555246897
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.4%

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 31
Current: $3,923 AUD|Low: $2,739 AUD|High: $6,858 AUD|Avg: $3,950 AUD|-0.6%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 11$2,806 AUD
Retailer 10$2,968 AUD
Retailer 7$3,022 AUD
Retailer 4$3,088 AUD
Retailer 5$3,091 AUD
Retailer 17$3,338 AUD
Retailer 3$3,388 AUD
Retailer 9$3,448 AUD
Retailer 6$3,844 AUD
Retailer 15$3,844 AUD
Retailer 1$3,923 AUD
Retailer 16$3,972 AUD
Retailer 8$4,265 AUD
Retailer 13$4,332 AUD
Retailer 14$4,517 AUD
Retailer 12$4,539 AUD
Retailer 2$6,478 AUD

34 data points across 17 retailers

21 retailers$2,806 AUD to $6,478 AUD

A
Cheapest Retailer
-
$2,806 AUD
HK$15,400 HKD
A
Retailer 2
-
$2,968 AUD
$2,085 USD
View
A
Retailer 3
-
$3,022 AUD
$2,123 USD
View
A
Retailer 4
-
$3,088 AUD
$2,169 USD
View
Final sale: no returns
A
Retailer 5
-
$3,091 AUD
$2,171 USD
View
A
Retailer 6
-
$3,120 AUD
View
B+
Retailer 7
-
$3,338 AUD
$2,345 USD
View
B+
Retailer 8
-
$3,388 AUD
$2,380 USD
View
Retailer 9
-
$3,448 AUD
$2,422 USD
View
Price last confirmed 24 days ago
Retailer 10
-
$3,607 AUD
$2,534 USD
View
Price last confirmed 32 days ago
B+
Retailer 11
-
$3,844 AUD
$2,700 USD
View
B+
Retailer 12
-
$3,844 AUD
$2,700 USD
View
B+
Retailer 13
-
$3,923 AUD
£2,170 GBP
View
B+
Retailer 14
-
$3,972 AUD
$2,790 USD
View
Retailer 15
-
$3,979 AUD
$2,795 USD
View
Price last confirmed 32 days ago
Retailer 16
-
$4,265 AUD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
$4,332 AUD
€2,898 EUR
View
B+
Retailer 18
-
$4,517 AUD
$3,173 USD
View
B+
Retailer 19
-
$4,539 AUD
ZAR 51,511 ZAR
View
B
Retailer 20
-
$6,478 AUD
£3,583 GBP
View
Most Expensive
NZ Jewellers
593a8d85-e95d-4e46-bc6d-94eacbe213fd · Sep 27
$7,958 AUD
$5,590 USD
View
Price last confirmed 35 days ago
20 more retailers have this diamond
Prices start from $2,806 AUDSave up to $3,672 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
1.00ct Round
$2,806 AUD