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Round|Natural|GIA

1.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6435526632

Certificate GIA 6435526632

Diamond specifications and retailer prices

From $3,985 SGD
As of November 4, 2026
Save $4,688 SGD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,912 SGD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6435526632. Listed at 16 retailers as of November 1, 2026, with a 118% 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

1.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6435526632
Dimensions7.33 × 7.29 × 4.56 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.33 mm7.29 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6435526632
Side View
Table 57.0%Crown 36°Girdle: MediumPavilion 41°Culet: NoneDepth 62.4%

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 4
Current: $5,220 SGD|Low: $3,985 SGD|High: $9,158 SGD|Avg: $5,188 SGD|-7.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12$3,985 SGD
Retailer 8$4,036 SGD
Retailer 4$4,052 SGD
Retailer 13$4,170 SGD
Retailer 2$4,362 SGD
Retailer 3$4,413 SGD
Retailer 10$4,509 SGD
Retailer 11$4,699 SGD
Retailer 1$5,220 SGD
Retailer 7$5,671 SGD
Retailer 5$5,870 SGD
Retailer 6$6,330 SGD
Retailer 9$8,673 SGD

43 data points across 13 retailers

16 retailers$3,985 SGD to $8,673 SGD

A
Cheapest Retailer
-
$3,985 SGD
A
Retailer 2
-
$4,036 SGD
View
A
Retailer 3
-
$4,052 SGD
View
A
Retailer 4
-
$4,170 SGD
View
A
Retailer 5
-
$4,362 SGD
View
A
Retailer 6
-
$4,413 SGD
View
A
Retailer 7
-
$4,509 SGD
View
Retailer 8
-
$4,699 SGD
View
Price last confirmed 13 days ago
Retailer 9
-
$5,154 SGD
View
Price last confirmed 45 days ago
B+
Retailer 10
-
$5,220 SGD
View
B+
Retailer 11
-
$5,671 SGD
View
Retailer 12
-
$5,870 SGD
View
Price last confirmed 14 days ago
Retailer 13
-
$5,947 SGD
View
Price last confirmed 45 days ago
B+
Retailer 14
-
$6,330 SGD
View
B
Retailer 15
-
$8,673 SGD
View
Most Expensive
NZ Jewellers
2bf72783-4f62-4dcf-9291-b59d4f1f36b8 · Sep 25
$9,912 SGD
$7,760 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from $3,985 SGDSave up to $4,688 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
1.50ct Round
$3,985 SGD