<prompt> Most common salivary gland involved by stone isParotidSubmandibularMinorNone  <response>: Eighty percent of all salivary stones occur in the submandibular gland, 10 occur in parotid, 7 in the sublingual and the remainder occurs in minor salivary glands Eighty percent of submandibular stones are radio-opaque and can be identified on plain radiographs. In contrast parotid stones are usually radiolucent and rarely visible on plain radiography. Ref : Bailey Love 25e p755 