Radiant|Natural|GIA

1.51ct E SI2 Radiant Natural Diamond

EX • E/SI2

Diamond specifications and retailer prices

From $6,516 USD
As of October 25, 2026
Save $6,517 USD (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,155 USD at NZ Jewellers · As of September 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 19 retailers as of October 24, 2026, with a 100% 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

1.51
Carat
E
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions7.67 × 5.68 × 3.79 mm
L/W Ratio1.35
Top View
7.67 mm5.68 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 67.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.7%

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: Oct 25
Current: $13,033 USD|Low: $6,516 USD|High: $13,155 USD|Avg: $7,848 USD|-0.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 2$6,516 USD
Retailer 10$6,710 USD
Retailer 7$6,924 USD
Retailer 4$7,059 USD
Retailer 3$7,168 USD
Retailer 8$7,306 USD
Retailer 5$7,385 USD
Retailer 9$7,722 USD
Retailer 6$8,145 USD
NZ Jewellers$13,033 USD

39 data points across 10 retailers

19 retailers$6,516 USD to $13,033 USD

A
Cheapest Retailer
-
$6,516 USD
A
Retailer 2
-
$6,516 USD
View
Retailer 3
-
$6,577 USD
View
Price last confirmed 21 days ago
A
Retailer 4
-
$6,710 USD
CA$9,320 CAD
View
A
Retailer 5
-
$6,924 USD
View
A
Retailer 6
-
$7,059 USD
View
B+
Retailer 7
-
$7,059 USD
View
Retailer 8
-
$7,125 USD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$7,168 USD
View
B+
Retailer 10
-
$7,168 USD
View
Retailer 11
-
$7,235 USD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
$7,306 USD
View
B+
Retailer 13
-
$7,385 USD
£5,815 GBP
View
B+
Retailer 14
-
$7,722 USD
View
B+
Retailer 15
-
$8,145 USD
View
Retailer 16
-
$8,222 USD
View
Price last confirmed 53 days ago
Retailer 17
-
$8,222 USD
View
Price last confirmed 31 days ago
B
Retailer 18
-
$13,033 USD
View
Most Expensive
NZ Jewellers
ff8c50ad-30fc-4b3c-9998-5b3eced69d03 · Sep 30
$13,155 USD
View
Price last confirmed 29 days ago
18 more retailers have this diamond
Prices start from $6,516 USDSave up to $6,517 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
$6,516 USD