Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

GD • E/SI1 • GIA 1549544742

Certificate GIA 1549544742

Diamond specifications and retailer prices

From $4,377 USD
₹416,833 INR
As of October 29, 2026
Save $1,152 USD (21%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,529 USD at Blue Nile · As of October 29, 2026
View at Blue Nile

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1549544742. Listed at 7 retailers as of October 29, 2026, with prices from $4,377 to $5,529, a $1,152 spread on the same certified stone. Blue Nile lists it at $5,529. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1549544742
Dimensions6.90 × 5.63 × 4.06 mm
L/W Ratio1.23
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.90 mm5.63 mm1.51 ctE / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549544742
Side View
Table 68.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 72.1%

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 29
Current: $5,529 USD|Low: $4,347 USD|High: $6,354 USD|Avg: $5,321 USD|-10.5%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 2$4,377 USD
Retailer 3$4,666 USD
Retailer 5$4,914 USD
Retailer 4$5,041 USD
Retailer 6$5,478 USD
Blue Nile$5,529 USD
Retailer 7$6,354 USD

46 data points across 7 retailers

7 retailers$4,377 USD to $5,529 USD

A
Cheapest Retailer
-
$4,377 USD
₹416,833 INR
A
Retailer 2
-
$4,666 USD
View
A
Retailer 3
-
$4,914 USD
MYR 20,016 MYR
View
A
Retailer 4
-
$5,041 USD
SGD 6,812 SGD
View
B+
Retailer 5
-
$5,451 USD
A$8,386 AUD
View
B+
Retailer 6
-
$5,478 USD
A$8,428 AUD
View
Most Expensive
B+
Blue Nile
28033809 · Oct 29
$5,529 USD
View
6 more retailers have this diamond
Prices start from $4,377 USDSave up to $1,152 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
$4,377 USD