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Radiant|Natural|GIA

1.53ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 85

Certificate GIA 85

Diamond specifications and retailer prices

From $16,296 AUD
As of November 6, 2026
Save $4,168 AUD (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $20,464 AUD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.53ct natural radiant diamond

This 1.53ct 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. Listed at 3 retailers as of November 5, 2026, with prices from $16,296 to $20,464, a $4,168 spread on the same certified stone. Blue Nile lists it at $20,464. 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

1.53
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 85
Dimensions7.67 × 5.78 × 3.87 mm
L/W Ratio1.33
Top View
7.67 mm5.78 mm1.53 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 85
Side View
Table 64.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: $20,464 AUD|Low: $16,110 AUD|High: $20,464 AUD|Avg: $17,944 AUD
Blue Nile
Retailer 2
Retailer 3
September 23, 2026
Retailer 2$16,296 AUD
Retailer 3$17,424 AUD
Blue Nile$20,464 AUD

3 data points across 3 retailers

3 retailers$16,296 AUD to $20,464 AUD

B+
Cheapest Retailer
-
$16,296 AUD
B
Retailer 2
-
$17,424 AUD
View
Most Expensive
B
Blue Nile
17728743 · Nov 5
$20,464 AUD
$14,061 USD
View
2 more retailers have this diamond
Prices start from $16,296 AUDSave up to $4,168 AUD

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.

B+
1.53ct Radiant
$16,296 AUD