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Radiant|Natural|GIA

0.51ct H SI2 Radiant Natural Diamond

GD • H/SI2 • GIA 2487593176

Certificate GIA 2487593176

Diamond specifications and retailer prices

From $817 AUD
$574 USD
As of October 31, 2026
Save $1,229 AUD (60%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,780 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2487593176. Listed at 13 retailers as of October 31, 2026, with a 150% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.51
Carat
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2487593176
Dimensions5.45 × 3.99 × 2.67 mm
L/W Ratio1.37
Top View
5.45 mm3.99 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2487593176
Side View
Table 65.0%CrownGirdlePavilionCulet: 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: Oct 31
Current: $2,047 AUD|Low: $817 AUD|High: $2,072 AUD|Avg: $1,152 AUD|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$817 AUD
Retailer 7$856 AUD
Retailer 8$989 AUD
Retailer 9$997 AUD
Retailer 2$1,055 AUD
Retailer 10$1,074 AUD
Retailer 3$1,090 AUD
Retailer 5$1,111 AUD
Retailer 4$1,305 AUD
Retailer 1$2,047 AUD

39 data points across 10 retailers

13 retailers$817 AUD to $2,047 AUD

B+
Cheapest Retailer
-
$817 AUD
$574 USD
Final sale: no returns
B+
Retailer 2
-
$856 AUD
HK$4,700 HKD
View
Retailer 3
-
$887 AUD
$623 USD
View
Price last confirmed 25 days ago
Retailer 4
-
$955 AUD
$671 USD
View
Price last confirmed 25 days ago
Retailer 5
-
$955 AUD
$671 USD
View
Price last confirmed 31 days ago
B+
Retailer 6
-
$997 AUD
$700 USD
View
Retailer 7
-
$1,022 AUD
$718 USD
View
Price last confirmed 34 days ago
B
Retailer 8
-
$1,074 AUD
$755 USD
View
B
Retailer 9
-
$1,090 AUD
£603 GBP
View
B
Retailer 10
-
$1,111 AUD
£614 GBP
View
B
Retailer 11
-
$1,305 AUD
€873 EUR
View
C
Retailer 12
-
$2,047 AUD
£1,132 GBP
View
Most Expensive
NZ Jewellers
d6dc6454-e84f-46e0-83b5-2cd0c0acb8b3 · Sep 30
$2,780 AUD
$1,953 USD
View
Price last confirmed 32 days ago
12 more retailers have this diamond
Prices start from $817 AUDSave up to $1,229 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
$817 AUD