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Round|Natural|GIA

0.90ct K SI1 Round Natural Diamond

VG • K/SI1 • GIA 1558242021

Certificate GIA 1558242021

Diamond specifications and retailer prices

From $948 SGD
As of November 6, 2026
Save $3,091 SGD (77%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,039 SGD at NZ Jewellers · As of November 5, 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 very-good cut grade and certified by GIA 1558242021. Listed at 17 retailers as of November 5, 2026, with prices from $948 to $4,039, a $3,091 spread on the same certified stone. NZ Jewellers lists it at $4,039. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.90
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle38°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 1558242021
Dimensions5.94 × 6.03 × 3.85 mm
L/W Ratio1.02
Girdle conditionFaceted
Key to symbols
Crystal
Top View
5.94 mm6.03 mm0.90 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1558242021
Side View
Table 58.0%Crown 38°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.3%

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 6
Current: $4,039 SGD|Low: $948 SGD|High: $4,039 SGD|Avg: $1,788 SGD|+26.8%
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
November 6, 2026
Retailer 5$948 SGD
Retailer 11$1,068 SGD
Retailer 8$1,151 SGD
Retailer 6$1,259 SGD
Retailer 7$1,305 SGD
Retailer 9$1,325 SGD
Retailer 13$1,334 SGD
Retailer 16$1,445 SGD
Retailer 3$1,487 SGD
Retailer 10$1,533 SGD
Retailer 4$1,796 SGD
Retailer 15$1,804 SGD
Retailer 12$1,887 SGD
Retailer 14$2,355 SGD
Retailer 2$3,060 SGD
NZ Jewellers$4,039 SGD

25 data points across 16 retailers

17 retailers$948 SGD to $4,039 SGD

A
Cheapest Retailer
-
$948 SGD
A
Retailer 2
-
$1,068 SGD
View
A
Retailer 3
-
$1,151 SGD
View
B+
Retailer 4
-
$1,259 SGD
View
Retailer 5
-
$1,305 SGD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$1,325 SGD
View
B+
Retailer 7
-
$1,334 SGD
View
Retailer 8
-
$1,337 SGD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$1,445 SGD
View
B+
Retailer 10
-
$1,487 SGD
View
B+
Retailer 11
-
$1,533 SGD
View
B
Retailer 12
-
$1,796 SGD
View
B+
Retailer 13
-
$1,804 SGD
View
B
Retailer 14
-
$1,887 SGD
View
B
Retailer 15
-
$2,355 SGD
View
B
Retailer 16
-
$3,060 SGD
View
Most Expensive
C
NZ Jewellers
2242df72-53f1-4102-b6f8-e40cc2fbb2a0 · Nov 5
$4,039 SGD
$3,162 USD
View
16 more retailers have this diamond
Prices start from $948 SGDSave up to $3,091 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
$948 SGD