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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 $1,018 NZD
$574 USD
As of November 2, 2026
Save $1,532 NZD (60%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,465 NZD 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 November 1, 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: Nov 2
Current: $1,359 NZD|Low: $1,018 NZD|High: $2,582 NZD|Avg: $1,435 NZD|+6.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6$1,018 NZD
Retailer 7$1,067 NZD
Retailer 8$1,233 NZD
Retailer 9$1,242 NZD
Retailer 2$1,315 NZD
Retailer 10$1,339 NZD
Retailer 1$1,359 NZD
Retailer 5$1,384 NZD
Retailer 4$1,626 NZD
Retailer 3$2,551 NZD

40 data points across 10 retailers

13 retailers$1,018 NZD to $2,551 NZD

B+
Cheapest Retailer
-
$1,018 NZD
$574 USD
Final sale: no returns
B+
Retailer 2
-
$1,067 NZD
HK$4,700 HKD
View
Retailer 3
-
$1,105 NZD
$623 USD
View
Price last confirmed 25 days ago
Retailer 4
-
$1,191 NZD
$671 USD
View
Price last confirmed 25 days ago
Retailer 5
-
$1,191 NZD
$671 USD
View
Price last confirmed 32 days ago
B+
Retailer 6
-
$1,242 NZD
$700 USD
View
Retailer 7
-
$1,274 NZD
$718 USD
View
Price last confirmed 34 days ago
B
Retailer 8
-
$1,339 NZD
$755 USD
View
B
Retailer 9
-
$1,359 NZD
£603 GBP
View
B
Retailer 10
-
$1,384 NZD
£614 GBP
View
B
Retailer 11
-
$1,626 NZD
€873 EUR
View
C
Retailer 12
-
$2,551 NZD
£1,132 GBP
View
Most Expensive
NZ Jewellers
d6dc6454-e84f-46e0-83b5-2cd0c0acb8b3 · Sep 30
$3,465 NZD
$1,953 USD
View
Price last confirmed 32 days ago
12 more retailers have this diamond
Prices start from $1,018 NZDSave up to $1,532 NZD

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
$1,018 NZD