Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7556598300

Certificate GIA 7556598300

Diamond specifications and retailer prices

From $697 AUD
$490 USD
As of October 28, 2026
Save $2,168 AUD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,124 AUD at NZ Jewellers · As of October 17, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7556598300. Listed at 20 retailers as of October 27, 2026, with a 311% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7556598300
Dimensions5.10 × 5.13 × 3.18 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.10 mm5.13 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556598300
Side View
Table 55.0%Crown 33.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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: Oct 28
Current: $1,478 AUD|Low: $697 AUD|High: $2,328 AUD|Avg: $1,389 AUD|+28.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 8$697 AUD
Retailer 7$931 AUD
Retailer 2$1,194 AUD
Retailer 5$1,291 AUD
Retailer 3$1,326 AUD
Retailer 1$1,478 AUD
Retailer 9$1,498 AUD
Retailer 4$1,520 AUD
Retailer 6$2,313 AUD

35 data points across 9 retailers

20 retailers$697 AUD to $2,865 AUD

A
Cheapest Retailer
-
$697 AUD
$490 USD
Final sale: no returns
A
Retailer 2
-
$903 AUD
$635 USD
View
Price last confirmed 58 days ago
A
Retailer 3
-
$927 AUD
$652 USD
View
A
Retailer 4
-
$931 AUD
$655 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$938 AUD
$660 USD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$971 AUD
$683 USD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
$971 AUD
$683 USD
View
Price last confirmed 14 days ago
B+
Retailer 8
-
$1,041 AUD
$732 USD
View
Price last confirmed 37 days ago
B+
Retailer 9
-
$1,059 AUD
$745 USD
View
Price last confirmed 11 days ago
B+
Retailer 10
-
$1,105 AUD
$777 USD
View
B
Retailer 11
-
$1,263 AUD
$888 USD
View
B+
Retailer 12
-
$1,291 AUD
£715 GBP
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$1,326 AUD
€888 EUR
View
B+
Retailer 14
-
$1,390 AUD
$977 USD
View
B
Retailer 15
-
$1,478 AUD
£819 GBP
View
B
Retailer 16
-
$1,498 AUD
View
Price last confirmed 24 days ago
B
Retailer 17
-
$1,520 AUD
ZAR 17,270 ZAR
View
Price last confirmed 7 days ago
B
Retailer 18
-
$2,313 AUD
£1,281 GBP
View
Price last confirmed 8 days ago
B
Retailer 19
-
$2,865 AUD
CA$2,799 CAD
View
Most Expensive
B
NZ Jewellers
78702d42-a443-444e-83f8-37bb25aa21a8 · Oct 17
$3,124 AUD
$2,197 USD
View
Price last confirmed 12 days ago
19 more retailers have this diamond
Prices start from $697 AUDSave up to $2,168 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
$697 AUD