Meanings of make of quicksilver in English

And, after all, it's more likely to be a fairy's boat, for it's made of quicksilver.

"How did you come to be made of quicksilver?" said Tatiana Markovna, affectionately.

It was not long but Perkin, who was made of quicksilver, which is hard to hold or imprison, began to stir.

There was also one mineral "oyntment" made of quicksilver, verdigris, and brimstone mixed with "barrows grease," which was good for "horse, man, or other beast."