Definition of "wonder-stone" [wonder-stone]

• The name given to a bed occurring in the Red Marl (Triassic) near Wells, England, which is described by Buckland and Conybeare as being “a beautiful breccia, consisting of yellow transparent crystals of carbonate of lime disseminated through a dark red earthy dolomite.” (noun)

The Century Dictionary (Public Domain)

• ""But," said he to the magician, "whither shall I bend my course? where is Mount Massis? and even if I succeed in reaching it, how shall I discover the wonder-stone?""
• "With these words they ushered him into the interior, and gave him the joyful intelligence that he had now accomplished everything that was necessary to put him in possession of the wonder-stone."
• "After this Jalaladdeen heard that the castle in which the wonder-stone was concealed lay on the other side of the hill; but still no one knew anything of the stone, nor had the inhabitants a satisfactory idea of the castle."