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Round|Natural|GIA

0.90ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6445689140

Certificate GIA 6445689140

Diamond specifications and retailer prices

From $1,340 AUD
As of November 5, 2026
Save $3,084 AUD (70%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,604 AUD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.9ct natural round diamond

This 0.9ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6445689140. Listed at 20 retailers as of November 5, 2026, with a 230% 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6445689140
Dimensions6.18 × 6.14 × 3.84 mm
L/W Ratio1.01
Top View
6.18 mm6.14 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6445689140
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 5
Current: $4,424 AUD|Low: $1,340 AUD|High: $4,424 AUD|Avg: $2,141 AUD
NZ Jewellers
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 5, 2026
Retailer 10$1,340 AUD
Retailer 9$1,618 AUD
Retailer 14$1,664 AUD
Retailer 3$1,737 AUD
Retailer 5$1,750 AUD
Retailer 7$1,814 AUD
Retailer 17$1,814 AUD
Retailer 15$1,883 AUD
Retailer 4$1,897 AUD
Retailer 16$1,978 AUD
Retailer 6$2,006 AUD
Retailer 12$2,040 AUD
Retailer 8$2,093 AUD
Retailer 2$2,331 AUD
Retailer 11$2,656 AUD
Retailer 13$3,313 AUD
NZ Jewellers$4,424 AUD

32 data points across 17 retailers

20 retailers$1,340 AUD to $4,424 AUD

A
Cheapest Retailer
-
$1,340 AUD
A
Retailer 2
-
$1,618 AUD
View
A
Retailer 3
-
$1,664 AUD
View
B+
Retailer 4
-
$1,737 AUD
View
B+
Retailer 5
-
$1,750 AUD
View
Retailer 6
-
$1,814 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$1,814 AUD
View
B+
Retailer 8
-
$1,883 AUD
View
Retailer 9
-
$1,887 AUD
View
Price last confirmed 44 days ago
B+
Retailer 10
-
$1,897 AUD
View
B+
Retailer 11
-
$1,978 AUD
View
B+
Retailer 12
-
$2,006 AUD
View
B+
Retailer 13
-
$2,040 AUD
View
B+
Retailer 14
-
$2,093 AUD
View
Retailer 15
-
$2,178 AUD
View
Price last confirmed 45 days ago
B
Retailer 16
-
$2,331 AUD
View
B
Retailer 17
-
$2,656 AUD
View
B
Retailer 18
-
$3,313 AUD
View
B
Retailer 19
-
$4,424 AUD
View
Most Expensive
NZ Jewellers
07ab2574-a29e-409b-9c2a-a355e5b43375 · Sep 25
$4,604 AUD
$3,223 USD
View
Price last confirmed 41 days ago
19 more retailers have this diamond
Prices start from $1,340 AUDSave up to $3,084 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 Round
$1,340 AUD