Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

ID • H/SI1 • GIA 5563118999

Certificate GIA 5563118999

Diamond specifications and retailer prices

From $3,257 USD
As of November 1, 2026
Save $2,893 USD (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,150 USD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5563118999. Listed at 9 retailers as of November 1, 2026, with prices from $3,257 to $6,150, a $2,893 spread on the same certified stone. NZ Jewellers lists it at $6,150. 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

1.51
Carat
H
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle51.21°
Pavilion angle36.78°
OriginNatural
Grading LabGIA
CertificateGIA 5563118999
Dimensions7.52 × 5.79 × 3.92 mm
L/W Ratio1.30
Girdle conditionThick
Key to symbols
Crystal, Cavity, Feather, Needle, Natural
Top View
7.52 mm5.79 mm1.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5563118999
Side View
Table 71.0%Crown 51.21°Girdle: MED-POLPavilion 36.78°Culet: NoneDepth 67.7%

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 1
Current: $6,150 USD|Low: $3,221 USD|High: $6,226 USD|Avg: $4,231 USD|-1.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 5$3,257 USD
Retailer 3$3,325 USD
Retailer 2$3,490 USD
Retailer 7$3,530 USD
Retailer 9$3,610 USD
Retailer 6$3,666 USD
Retailer 8$3,780 USD
Retailer 4$5,902 USD
NZ Jewellers$6,150 USD

35 data points across 9 retailers

9 retailers$3,257 USD to $6,150 USD

A
Cheapest Retailer
-
$3,257 USD
A
Retailer 2
-
$3,325 USD
View
A
Retailer 3
-
$3,490 USD
View
A
Retailer 4
-
$3,530 USD
View
A
Retailer 5
-
$3,610 USD
View
A
Retailer 6
-
$3,666 USD
View
Retailer 7
-
$3,780 USD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
$5,902 USD
View
Most Expensive
B+
NZ Jewellers
f1ce2716-69c6-4751-816e-3e008bf35d4b · Nov 3
$6,150 USD
View
8 more retailers have this diamond
Prices start from $3,257 USDSave up to $2,893 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
1.51ct Radiant
$3,257 USD