Radiant|Natural|GIA

1.51ct J SI2 Radiant Natural Diamond

ID • J/SI2 • GIA 1509049420

Certificate GIA 1509049420

Diamond specifications and retailer prices

From $2,367 USD
£1,864 GBP
As of October 31, 2026
Save $2,890 USD (55%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,257 USD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1509049420. Listed at 7 retailers as of October 30, 2026, with prices from $2,367 to $5,257, a $2,890 spread on the same certified stone. NZ Jewellers lists it at $5,257. 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
J
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.94°
Pavilion angle30.54°
OriginNatural
Grading LabGIA
CertificateGIA 1509049420
Dimensions7.29 × 5.66 × 3.86 mm
L/W Ratio1.29
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Needle
Top View
7.29 mm5.66 mm1.51 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509049420
Side View
Table 68.0%Crown 46.94°Girdle: ThickPavilion 30.54°Culet: NoneDepth 68.2%

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: Oct 31
Current: $5,257 USD|Low: $2,293 USD|High: $5,415 USD|Avg: $3,300 USD|-2.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 2$2,367 USD
Retailer 3$2,493 USD
Retailer 6$2,514 USD
Retailer 5$2,630 USD
Retailer 7$2,659 USD
Retailer 4$4,411 USD
NZ Jewellers$5,257 USD

40 data points across 7 retailers

7 retailers$2,367 USD to $5,257 USD

A
Cheapest Retailer
-
$2,367 USD
£1,864 GBP
A
Retailer 2
-
$2,493 USD
£1,963 GBP
View
A
Retailer 3
-
$2,514 USD
View
A
Retailer 4
-
$2,630 USD
View
A
Retailer 5
-
$2,659 USD
View
B+
Retailer 6
-
$4,411 USD
£3,473 GBP
View
Most Expensive
B
NZ Jewellers
2e6e491d-5770-4b9f-a3a8-e7cd0dc121c4 · Oct 30
$5,257 USD
View
6 more retailers have this diamond
Prices start from $2,367 USDSave up to $2,890 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
$2,367 USD