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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 $1,198 SGD
As of November 5, 2026
Save $2,758 SGD (70%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,117 SGD 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,956 SGD|Low: $1,198 SGD|High: $3,956 SGD|Avg: $1,914 SGD
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$1,198 SGD
Retailer 9$1,447 SGD
Retailer 14$1,488 SGD
Retailer 3$1,553 SGD
Retailer 5$1,565 SGD
Retailer 7$1,622 SGD
Retailer 17$1,622 SGD
Retailer 15$1,683 SGD
Retailer 4$1,696 SGD
Retailer 16$1,769 SGD
Retailer 6$1,793 SGD
Retailer 12$1,824 SGD
Retailer 8$1,871 SGD
Retailer 2$2,085 SGD
Retailer 11$2,375 SGD
Retailer 13$2,962 SGD
NZ Jewellers$3,956 SGD

32 data points across 17 retailers

20 retailers$1,198 SGD to $3,956 SGD

A
Cheapest Retailer
-
$1,198 SGD
A
Retailer 2
-
$1,447 SGD
View
A
Retailer 3
-
$1,488 SGD
View
B+
Retailer 4
-
$1,553 SGD
View
B+
Retailer 5
-
$1,565 SGD
View
Retailer 6
-
$1,622 SGD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$1,622 SGD
View
B+
Retailer 8
-
$1,683 SGD
View
Retailer 9
-
$1,687 SGD
View
Price last confirmed 44 days ago
B+
Retailer 10
-
$1,696 SGD
View
B+
Retailer 11
-
$1,769 SGD
View
B+
Retailer 12
-
$1,793 SGD
View
B+
Retailer 13
-
$1,824 SGD
View
B+
Retailer 14
-
$1,871 SGD
View
Retailer 15
-
$1,948 SGD
View
Price last confirmed 45 days ago
B
Retailer 16
-
$2,085 SGD
View
B
Retailer 17
-
$2,375 SGD
View
B
Retailer 18
-
$2,962 SGD
View
B
Retailer 19
-
$3,956 SGD
View
Most Expensive
NZ Jewellers
07ab2574-a29e-409b-9c2a-a355e5b43375 · Sep 25
$4,117 SGD
$3,223 USD
View
Price last confirmed 41 days ago
19 more retailers have this diamond
Prices start from $1,198 SGDSave up to $2,758 SGD

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
$1,198 SGD