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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 $1,669 NZD
As of November 5, 2026
Save $3,841 NZD (70%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,733 NZD 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: $5,509 NZD|Low: $1,669 NZD|High: $5,509 NZD|Avg: $2,666 NZD
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$1,669 NZD
Retailer 9$2,015 NZD
Retailer 14$2,072 NZD
Retailer 3$2,163 NZD
Retailer 5$2,179 NZD
Retailer 7$2,259 NZD
Retailer 17$2,259 NZD
Retailer 15$2,345 NZD
Retailer 4$2,362 NZD
Retailer 16$2,464 NZD
Retailer 6$2,498 NZD
Retailer 12$2,540 NZD
Retailer 8$2,606 NZD
Retailer 2$2,903 NZD
Retailer 11$3,307 NZD
Retailer 13$4,125 NZD
NZ Jewellers$5,509 NZD

32 data points across 17 retailers

20 retailers$1,669 NZD to $5,509 NZD

A
Cheapest Retailer
-
$1,669 NZD
A
Retailer 2
-
$2,015 NZD
View
A
Retailer 3
-
$2,072 NZD
View
B+
Retailer 4
-
$2,163 NZD
View
B+
Retailer 5
-
$2,179 NZD
View
Retailer 6
-
$2,259 NZD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$2,259 NZD
View
B+
Retailer 8
-
$2,345 NZD
View
Retailer 9
-
$2,350 NZD
View
Price last confirmed 44 days ago
B+
Retailer 10
-
$2,362 NZD
View
B+
Retailer 11
-
$2,464 NZD
View
B+
Retailer 12
-
$2,498 NZD
View
B+
Retailer 13
-
$2,540 NZD
View
B+
Retailer 14
-
$2,606 NZD
View
Retailer 15
-
$2,713 NZD
View
Price last confirmed 45 days ago
B
Retailer 16
-
$2,903 NZD
View
B
Retailer 17
-
$3,307 NZD
View
B
Retailer 18
-
$4,125 NZD
View
B
Retailer 19
-
$5,509 NZD
View
Most Expensive
NZ Jewellers
07ab2574-a29e-409b-9c2a-a355e5b43375 · Sep 25
$5,733 NZD
$3,223 USD
View
Price last confirmed 41 days ago
19 more retailers have this diamond
Prices start from $1,669 NZDSave up to $3,841 NZD

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
$1,669 NZD