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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7551317215

Certificate GIA 7551317215

Diamond specifications and retailer prices

From $553 AUD
As of November 6, 2026
Save $1,801 AUD (77%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,354 AUD at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round 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 and certified by GIA 7551317215. Listed at 15 retailers as of November 4, 2026, with prices from $553 to $2,354, a $1,801 spread on the same certified stone. NZ Jewellers lists it at $2,354. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7551317215
Dimensions5.09 × 5.12 × 3.19 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather, Cloud
Top View
5.09 mm5.12 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551317215
Side View
Table 57.0%Crown 35°Girdle: THN-MEDPavilion 41.4°Culet: NDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,354 AUD|Low: $553 AUD|High: $2,407 AUD|Avg: $973 AUD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 2$553 AUD
Retailer 3$597 AUD
Retailer 4$640 AUD
Retailer 7$726 AUD
Retailer 15$751 AUD
Retailer 5$801 AUD
Retailer 12$809 AUD
Retailer 6$820 AUD
Retailer 11$867 AUD
Retailer 9$927 AUD
Retailer 13$939 AUD
Retailer 8$1,014 AUD
Retailer 10$1,043 AUD
Retailer 14$1,734 AUD
NZ Jewellers$2,354 AUD

28 data points across 15 retailers

15 retailers$553 AUD to $2,354 AUD

A
Cheapest Retailer
-
$553 AUD
A
Retailer 2
-
$597 AUD
View
A
Retailer 3
-
$640 AUD
View
Retailer 4
-
$726 AUD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$751 AUD
View
Retailer 6
-
$801 AUD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$809 AUD
View
Retailer 8
-
$820 AUD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$867 AUD
View
A
Retailer 10
-
$927 AUD
View
A
Retailer 11
-
$939 AUD
View
B+
Retailer 12
-
$1,014 AUD
View
B+
Retailer 13
-
$1,043 AUD
View
B
Retailer 14
-
$1,734 AUD
View
Most Expensive
B
NZ Jewellers
5725664b-4f38-49c7-bb37-be002fbda403 · Nov 4
$2,354 AUD
$1,648 USD
View
14 more retailers have this diamond
Prices start from $553 AUDSave up to $1,801 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.

A
0.51ct Round
$553 AUD