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Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6505412227

Certificate GIA 6505412227

Diamond specifications and retailer prices

From $2,304 AUD
As of November 4, 2026
Save $3,974 AUD (63%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,278 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505412227. Listed at 16 retailers as of November 4, 2026, with prices from $2,304 to $6,278, a $3,974 spread on the same certified stone. NZ Jewellers lists it at $6,278. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle31.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6505412227
Dimensions6.47 × 6.43 × 3.92 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.47 mm6.43 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6505412227
Side View
Table 59.0%Crown 31.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.8%

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 4
Current: $2,463 AUD|Low: $2,257 AUD|High: $4,564 AUD|Avg: $2,939 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$2,304 AUD
Retailer 3$2,346 AUD
Retailer 10$2,386 AUD
Retailer 1$2,463 AUD
Retailer 12$2,583 AUD
Retailer 2$2,657 AUD
Retailer 4$2,693 AUD
Retailer 8$2,840 AUD
Retailer 5$2,984 AUD
Retailer 7$3,141 AUD
Retailer 6$3,487 AUD
Retailer 9$4,497 AUD

37 data points across 12 retailers

16 retailers$2,304 AUD to $6,278 AUD

A
Cheapest Retailer
-
$2,304 AUD
A
Retailer 2
-
$2,346 AUD
View
A
Retailer 3
-
$2,386 AUD
View
A
Retailer 4
-
$2,463 AUD
View
Retailer 5
-
$2,574 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$2,574 AUD
View
B+
Retailer 7
-
$2,583 AUD
View
B+
Retailer 8
-
$2,657 AUD
View
B+
Retailer 9
-
$2,693 AUD
View
B+
Retailer 10
-
$2,840 AUD
View
B+
Retailer 11
-
$2,970 AUD
View
B+
Retailer 12
-
$2,984 AUD
View
B+
Retailer 13
-
$3,141 AUD
View
B
Retailer 14
-
$3,487 AUD
View
B
Retailer 15
-
$4,497 AUD
View
Most Expensive
B
NZ Jewellers
86dc830f-720d-427e-b48b-c56f5dd959f7 · Nov 5
$6,278 AUD
$4,395 USD
View
15 more retailers have this diamond
Prices start from $2,304 AUDSave up to $3,974 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
$2,304 AUD