Answer:
Opal.
Step-by-step explanation:
William Shakespeare's "Twelfth Night" revolves around the comedic yet romantic relationships of the numerous characters. The themes of this play involve mistaken identity, love, ambition, reality, and appearances.
In Act II scene iv, Duke Orsino asks his page Cesario, Viola in disguise, to give his love Olivia a gemstone. With the directive to "Give her this jewel. Say My love can give no place, bide no denay." This gem referred to is an opal, as stated by the clown when he said "for thy mind is a very opal. I would have men of such constancy put to sea, that their business might be everything and their intent everywhere". Just like the gen can change its colors, the clown points out that Count Orsino is exactly the same.