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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7553746149

Certificate GIA 7553746149

Diamond specifications and retailer prices

From $961 AUD
As of November 4, 2026
Save $1,144 AUD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,611 AUD at NZ Jewellers · As of September 23, 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 7553746149. Listed at 18 retailers as of November 4, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7553746149
Dimensions5.13 × 5.16 × 3.15 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.13 mm5.16 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7553746149
Side View
Table 58.0%CrownGirdle: Med. - Sli. ThickPavilionCulet: NoneDepth 61.2%

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 4
Current: $1,451 AUD|Low: $881 AUD|High: $2,857 AUD|Avg: $1,574 AUD|+1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 7$961 AUD
Retailer 8$1,024 AUD
Retailer 6$1,043 AUD
Retailer 3$1,364 AUD
Retailer 1$1,451 AUD
Retailer 2$1,614 AUD
Retailer 4$2,106 AUD
Retailer 5$2,847 AUD

42 data points across 8 retailers

18 retailers$961 AUD to $2,106 AUD

A
Cheapest Retailer
-
$961 AUD
Final sale: no returns
B+
Retailer 2
-
$1,024 AUD
View
Retailer 3
-
$1,043 AUD
View
Price last confirmed 8 days ago
Retailer 4
-
$1,043 AUD
View
Price last confirmed 29 days ago
Retailer 5
-
$1,043 AUD
View
Price last confirmed 60 days ago
Retailer 6
-
$1,083 AUD
View
Price last confirmed 15 days ago
Retailer 7
-
$1,083 AUD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$1,194 AUD
View
Retailer 9
-
$1,204 AUD
View
Price last confirmed 53 days ago
Retailer 10
-
$1,204 AUD
View
Price last confirmed 44 days ago
Retailer 11
-
$1,204 AUD
View
Price last confirmed 60 days ago
B+
Retailer 12
-
$1,364 AUD
View
B
Retailer 13
-
$1,451 AUD
View
B
Retailer 14
-
$1,614 AUD
View
B
Retailer 15
-
$2,106 AUD
View
Retailer 16
-
$2,847 AUD
View
Price last confirmed 9 days ago
Retailer 17
-
$3,611 AUD
View
Price under review
Most Expensive
NZ Jewellers
da7f7d1e-7845-44d1-a0cb-83f959df6e4b · Sep 23
$3,611 AUD
$2,528 USD
View
Price under review
17 more retailers have this diamond
Prices start from $961 AUDSave up to $1,144 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
$961 AUD