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Radiant|Natural|GIA

0.51ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2215619618

Certificate GIA 2215619618

Diamond specifications and retailer prices

From $1,015 AUD
$711 USD
As of November 2, 2026
Save $706 AUD (41%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,721 AUD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded I 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 2215619618. Listed at 6 retailers as of November 2, 2026, with prices from $1,015 to $1,721, a $706 spread on the same certified stone. 77 Diamonds lists it at $1,721. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2215619618
Dimensions5.87 × 3.85 × 2.58 mm
L/W Ratio1.52
Culet sizeNone
Top View
5.87 mm3.85 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2215619618
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,721 AUD|Low: $922 AUD|High: $1,738 AUD|Avg: $1,386 AUD|+0.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2$1,015 AUD
Retailer 5$1,187 AUD
Retailer 4$1,455 AUD
Retailer 6$1,455 AUD
Retailer 3$1,498 AUD
77 Diamonds$1,721 AUD

37 data points across 6 retailers

6 retailers$1,015 AUD to $1,721 AUD

B+
Cheapest Retailer
-
$1,015 AUD
$711 USD
Final sale: no returns
B+
Retailer 2
-
$1,187 AUD
$832 USD
View
B
Retailer 3
-
$1,455 AUD
$1,020 USD
View
B
Retailer 4
-
$1,455 AUD
$1,020 USD
View
B
Retailer 5
-
$1,498 AUD
$1,050 USD
View
Most Expensive
B
77 Diamonds
RADMB5PMVXPDB · Nov 2
$1,721 AUD
£950 GBP
View
5 more retailers have this diamond
Prices start from $1,015 AUDSave up to $706 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+
0.51ct Radiant
$1,015 AUD