Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 1559156534

Certificate GIA 1559156534

Diamond specifications and retailer prices

From $5,560 USD
As of October 29, 2026
Save $4,412 USD (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $9,972 USD at NZ Jewellers · As of October 27, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559156534. Listed at 9 retailers as of October 27, 2026, with prices from $5,560 to $9,972, a $4,412 spread on the same certified stone. NZ Jewellers lists it at $9,972. 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
E
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle54.56°
Pavilion angle35.61°
OriginNatural
Grading LabGIA
CertificateGIA 1559156534
Dimensions7.23 × 5.70 × 4.02 mm
L/W Ratio1.27
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Cavity, Needle, Indented Natural
Top View
7.23 mm5.70 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559156534
Side View
Table 74.0%Crown 54.56°Girdle: MED-VTKPavilion 35.61°Culet: NoneDepth 70.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $9,972 USD|Low: $5,351 USD|High: $10,076 USD|Avg: $6,608 USD|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 11$5,351 USD
Retailer 8$5,560 USD
Retailer 2$5,611 USD
Retailer 10$5,760 USD
Retailer 5$5,962 USD
Retailer 6$5,962 USD
Retailer 7$5,972 USD
Retailer 9$6,067 USD
Retailer 3$6,345 USD
Retailer 4$8,832 USD
NZ Jewellers$9,972 USD

37 data points across 11 retailers

9 retailers$5,560 USD to $9,972 USD

A
Cheapest Retailer
-
$5,560 USD
A
Retailer 2
-
$5,611 USD
£4,418 GBP
View
A
Retailer 3
-
$5,760 USD
View
Price last confirmed 30 days ago
A
Retailer 4
-
$5,962 USD
View
A
Retailer 5
-
$5,962 USD
View
A
Retailer 6
-
$5,972 USD
A$9,188 AUD
View
Price last confirmed 19 days ago
A
Retailer 7
-
$6,067 USD
View
B+
Retailer 8
-
$8,832 USD
£6,954 GBP
View
Most Expensive
B
NZ Jewellers
4ae519c7-44c9-4346-8684-d693f49de9c5 · Oct 27
$9,972 USD
View
8 more retailers have this diamond
Prices start from $5,560 USDSave up to $4,412 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
$5,560 USD