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Radiant|Natural|GIA

0.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 6227209592

Certificate GIA 6227209592

Diamond specifications and retailer prices

From $1,234 AUD
$865 USD
As of November 2, 2026
Save $815 AUD (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,049 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 H 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 6227209592. Listed at 6 retailers as of November 2, 2026, with prices from $1,234 to $2,049, a $815 spread on the same certified stone. 77 Diamonds lists it at $2,049. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6227209592
Dimensions5.49 × 3.95 × 2.67 mm
L/W Ratio1.39
Top View
5.49 mm3.95 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6227209592
Side View
Table 70.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 67.4%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $2,049 AUD|Low: $1,122 AUD|High: $2,053 AUD|Avg: $1,621 AUD|+2.3%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2$1,234 AUD
77 Diamonds$2,049 AUD

34 data points across 2 retailers

6 retailers$1,234 AUD to $2,049 AUD

B+
Cheapest Retailer
-
$1,234 AUD
$865 USD
Final sale: no returns
B
Retailer 2
-
$1,401 AUD
$982 USD
View
B
Retailer 3
-
$1,741 AUD
$1,220 USD
View
B
Retailer 4
-
$1,741 AUD
$1,220 USD
View
B
Retailer 5
-
$1,798 AUD
$1,260 USD
View
Most Expensive
B
77 Diamonds
RADMBRW26HHMT · Nov 2
$2,049 AUD
£1,131 GBP
View
5 more retailers have this diamond
Prices start from $1,234 AUDSave up to $815 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
$1,234 AUD