Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6421167345

Certificate GIA 6421167345

Diamond specifications and retailer prices

From $558 CAD
$399 USD
As of October 28, 2026
Save $816 CAD (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $1,374 CAD 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 $558 to $1,374, a $816 spread on the same certified stone. MOH London lists it at $1,374. 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
Color
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: $1,374 CAD|Low: $558 CAD|High: $1,383 CAD|Avg: $881 CAD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 9$558 CAD
Retailer 6$577 CAD
Retailer 10$649 CAD
Retailer 4$730 CAD
Retailer 7$794 CAD
Retailer 5$905 CAD
Retailer 2$917 CAD
Retailer 8$948 CAD
Retailer 3$1,201 CAD
MOH London$1,374 CAD

42 data points across 10 retailers

28 retailers$558 CAD to $1,374 CAD

Retailer 1
-
$536 CAD
$383 USD
Price last confirmed 22 days ago
Retailer 2
-
$536 CAD
$383 USD
View
Price last confirmed 42 days ago
Retailer 3
-
$536 CAD
$383 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$558 CAD
$399 USD
View
Retailer 5
-
$559 CAD
$400 USD
View
Price last confirmed 75 days ago
B
Retailer 6
-
$577 CAD
$412 USD
View
Retailer 7
-
$577 CAD
$412 USD
View
Price last confirmed 14 days ago
Retailer 8
-
$598 CAD
$427 USD
View
Price last confirmed 31 days ago
B
Retailer 9
-
$686 CAD
$490 USD
View
B
Retailer 10
-
$686 CAD
$490 USD
View
B
Retailer 11
-
$700 CAD
$500 USD
View
B
Retailer 12
-
$703 CAD
$502 USD
View
Retailer 13
-
$722 CAD
$516 USD
View
Price last confirmed 21 days ago
Retailer 14
-
$722 CAD
$516 USD
View
Price last confirmed 38 days ago
Retailer 15
-
$722 CAD
$516 USD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$722 CAD
$516 USD
View
B
Retailer 17
-
$730 CAD
£410 GBP
View
B
Retailer 18
-
$794 CAD
$567 USD
View
B
Retailer 19
-
$899 CAD
$643 USD
View
B
Retailer 20
-
$905 CAD
€616 EUR
View
B
Retailer 21
-
$917 CAD
ZAR 10,588 ZAR
View
Retailer 22
-
$948 CAD
A$1,042 AUD
View
Price last confirmed 26 days ago
B
Retailer 23
-
$1,201 CAD
£676 GBP
View
Most Expensive
B
MOH London
1F2E23EE1 · Oct 29
$1,374 CAD
£773 GBP
View
23 more retailers have this diamond
Prices start from $558 CADSave up to $816 CAD

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
$558 CAD