Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6421167345

Certificate GIA 6421167345

Diamond specifications and retailer prices

From $568 AUD
$399 USD
As of October 28, 2026
Save $830 AUD (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $1,398 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 0.3ct natural round diamond

This 0.3ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6421167345. Listed at 28 retailers as of October 28, 2026, with prices from $568 to $1,398, a $830 spread on the same certified stone. MOH London lists it at $1,398. 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

0.30
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6421167345
Dimensions4.29 × 4.26 × 2.67 mm
L/W Ratio1.01
Top View
4.29 mm4.26 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421167345
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.4%

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 28
Current: $1,398 AUD|Low: $568 AUD|High: $1,407 AUD|Avg: $896 AUD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9$568 AUD
Retailer 6$587 AUD
Retailer 10$660 AUD
Retailer 2$742 AUD
Retailer 7$807 AUD
Retailer 5$921 AUD
Retailer 3$933 AUD
Retailer 8$964 AUD
Retailer 4$1,222 AUD
MOH London$1,398 AUD

42 data points across 10 retailers

28 retailers$568 AUD to $1,398 AUD

Retailer 1
-
$545 AUD
$383 USD
Price last confirmed 23 days ago
Retailer 2
-
$545 AUD
$383 USD
View
Price last confirmed 44 days ago
Retailer 3
-
$545 AUD
$383 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$568 AUD
$399 USD
View
Retailer 5
-
$569 AUD
$400 USD
View
Price last confirmed 76 days ago
B
Retailer 6
-
$587 AUD
$412 USD
View
Retailer 7
-
$587 AUD
$412 USD
View
Price last confirmed 15 days ago
Retailer 8
-
$608 AUD
$427 USD
View
Price last confirmed 32 days ago
B
Retailer 9
-
$698 AUD
$490 USD
View
B
Retailer 10
-
$698 AUD
$490 USD
View
B
Retailer 11
-
$712 AUD
$500 USD
View
B
Retailer 12
-
$715 AUD
$502 USD
View
Retailer 13
-
$735 AUD
$516 USD
View
Price last confirmed 22 days ago
Retailer 14
-
$735 AUD
$516 USD
View
Price last confirmed 39 days ago
Retailer 15
-
$735 AUD
$516 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$735 AUD
$516 USD
View
B
Retailer 17
-
$742 AUD
£410 GBP
View
B
Retailer 18
-
$807 AUD
$567 USD
View
B
Retailer 19
-
$915 AUD
$643 USD
View
B
Retailer 20
-
$921 AUD
€616 EUR
View
B
Retailer 21
-
$933 AUD
ZAR 10,588 ZAR
View
Retailer 22
-
$964 AUD
View
Price last confirmed 27 days ago
B
Retailer 23
-
$1,222 AUD
£676 GBP
View
Most Expensive
B
MOH London
1F2E23EE1 · Oct 29
$1,398 AUD
£773 GBP
View
23 more retailers have this diamond
Prices start from $568 AUDSave up to $830 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+
0.30ct Round
$568 AUD