The one word which confuses me slightly is 'Beside'. This word means 'Next to': for example, a picnic site beside the river. Do you mean 'next to', or were you thinking of 'besides'? If you were, then perhaps a phrase such as 'In addition to the different crystal structure..' would work better.
In the second part of the sentence, you can use either singular with 'a' or plural with no article:
...with a spherical and faceted shape ( if they all had the same shape)
..with spherical and faceted shapes (if they had different spherical and faceted shapes).