Round|Natural|GIA

1.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6435526632

Certificate GIA 6435526632

Diamond specifications and retailer prices

From $3,120 USD
As of November 4, 2026
Save $3,670 USD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,760 USD 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
Color
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: $4,087 USD|Low: $3,120 USD|High: $7,170 USD|Avg: $4,061 USD|-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$3,120 USD
Retailer 8$3,160 USD
Retailer 4$3,172 USD
Retailer 13$3,265 USD
Retailer 2$3,415 USD
Retailer 3$3,455 USD
Retailer 10$3,530 USD
Retailer 11$3,679 USD
Retailer 1$4,087 USD
Retailer 7$4,440 USD
Retailer 5$4,596 USD
Retailer 6$4,956 USD
Retailer 9$6,790 USD

43 data points across 13 retailers

16 retailers$3,120 USD to $6,790 USD

A
Cheapest Retailer
-
$3,120 USD
A
Retailer 2
-
$3,160 USD
View
A
Retailer 3
-
$3,172 USD
View
A
Retailer 4
-
$3,265 USD
View
A
Retailer 5
-
$3,415 USD
View
A
Retailer 6
-
$3,455 USD
View
A
Retailer 7
-
$3,530 USD
View
Retailer 8
-
$3,679 USD
View
Price last confirmed 13 days ago
Retailer 9
-
$4,035 USD
View
Price last confirmed 45 days ago
B+
Retailer 10
-
$4,087 USD
View
B+
Retailer 11
-
$4,440 USD
View
Retailer 12
-
$4,596 USD
View
Price last confirmed 14 days ago
Retailer 13
-
$4,656 USD
View
Price last confirmed 45 days ago
B+
Retailer 14
-
$4,956 USD
View
B
Retailer 15
-
$6,790 USD
View
Most Expensive
NZ Jewellers
2bf72783-4f62-4dcf-9291-b59d4f1f36b8 · Sep 25
$7,760 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from $3,120 USDSave up to $3,670 USD

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
$3,120 USD