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Radiant|Natural|GIA

1.50ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 7558451105

Certificate GIA 7558451105

Diamond specifications and retailer prices

From $3,430 USD
As of November 7, 2026
Save $2,782 USD (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,212 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural radiant diamond

This 1.5ct natural radiant 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 stated by the retailer rather than the lab and certified by GIA 7558451105. Listed at 11 retailers as of November 5, 2026, with prices from $3,430 to $6,212, a $2,782 spread on the same certified stone. NZ Jewellers lists it at $6,212. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7558451105
Dimensions7.75 × 5.36 × 3.81 mm
L/W Ratio1.45
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Pinpoint
Top View
7.75 mm5.36 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7558451105
Side View
Table 64.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 71.0%

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 7
Current: $6,212 USD|Low: $3,430 USD|High: $6,212 USD|Avg: $4,222 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 3$3,430 USD
Retailer 4$3,459 USD
Retailer 8$3,565 USD
Retailer 10$3,565 USD
Retailer 2$3,689 USD
Retailer 11$3,702 USD
Retailer 9$4,114 USD
Retailer 5$4,150 USD
Retailer 6$4,352 USD
Retailer 7$5,946 USD
NZ Jewellers$6,212 USD

33 data points across 11 retailers

11 retailers$3,430 USD to $6,212 USD

A
Cheapest Retailer
-
$3,430 USD
A
Retailer 2
-
$3,459 USD
View
Retailer 3
-
$3,565 USD
View
Price last confirmed 13 days ago
A
Retailer 4
-
$3,565 USD
View
A
Retailer 5
-
$3,689 USD
View
B+
Retailer 6
-
$3,702 USD
View
B+
Retailer 7
-
$4,114 USD
View
B+
Retailer 8
-
$4,150 USD
View
B+
Retailer 9
-
$4,352 USD
View
B
Retailer 10
-
$5,946 USD
View
Most Expensive
B
NZ Jewellers
1930ef7e-aff1-4fa7-af8f-e59a4e7b45cd · Nov 5
$6,212 USD
View
10 more retailers have this diamond
Prices start from $3,430 USDSave up to $2,782 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 Radiant
$3,430 USD