Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6421167345

Certificate GIA 6421167345

Diamond specifications and retailer prices

From €357 EUR
$399 USD
As of October 31, 2026
Save €517 EUR (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: €874 EUR at MOH London · As of November 1, 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 31, 2026, with prices from €357 to €874, a €517 spread on the same certified stone. MOH London lists it at €874. 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 31
Current: €874 EUR|Low: €357 EUR|High: €884 EUR|Avg: €564 EUR|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 9€357 EUR
Retailer 6€369 EUR
Retailer 10€415 EUR
Retailer 3€463 EUR
Retailer 7€508 EUR
Retailer 2€575 EUR
Retailer 4€587 EUR
Retailer 8€606 EUR
Retailer 5€768 EUR
MOH London€874 EUR

42 data points across 10 retailers

28 retailers€357 EUR to €874 EUR

Retailer 1
-
€343 EUR
$383 USD
Price last confirmed 24 days ago
Retailer 2
-
€343 EUR
$383 USD
View
Price last confirmed 44 days ago
Retailer 3
-
€343 EUR
$383 USD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
€357 EUR
$399 USD
View
Retailer 5
-
€358 EUR
$400 USD
View
Price last confirmed 77 days ago
B
Retailer 6
-
€369 EUR
$412 USD
View
Retailer 7
-
€369 EUR
$412 USD
View
Price last confirmed 16 days ago
Retailer 8
-
€382 EUR
$427 USD
View
Price last confirmed 33 days ago
B
Retailer 9
-
€439 EUR
$490 USD
View
B
Retailer 10
-
€439 EUR
$490 USD
View
B
Retailer 11
-
€448 EUR
$500 USD
View
B
Retailer 12
-
€449 EUR
$502 USD
View
Retailer 13
-
€462 EUR
$516 USD
View
Price last confirmed 23 days ago
Retailer 14
-
€462 EUR
$516 USD
View
Price last confirmed 40 days ago
Retailer 15
-
€462 EUR
$516 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
€462 EUR
$516 USD
View
B
Retailer 17
-
€463 EUR
£407 GBP
View
B
Retailer 18
-
€508 EUR
$567 USD
View
B
Retailer 19
-
€575 EUR
$643 USD
View
B
Retailer 20
-
€575 EUR
View
B
Retailer 21
-
€587 EUR
ZAR 10,588 ZAR
View
Retailer 22
-
€606 EUR
A$1,042 AUD
View
Price last confirmed 28 days ago
B
Retailer 23
-
€768 EUR
£676 GBP
View
Most Expensive
B
MOH London
1F2E23EE1 · Nov 1
€874 EUR
£769 GBP
View
23 more retailers have this diamond
Prices start from €357 EURSave up to €517 EUR

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
€357 EUR