Here are some examples of symbolism split up by category.
Metaphors: A metaphor is a figure of speech that uses symbolism.
Time is money
Life is a roller-coaster
He is a rock
Love is a jewel
Allegory as symbolism: Allegory is an extended use of symbolism and metaphors.
“All the world's a stage,And all the men and women merely players;they have their exits and their entrances;And one man in his time plays many parts,” -Shakespeare
Symbolism in poetry
“Ah Sunflower, weary of time, Who countest the steps of the sun; Seeking after that sweet golden clime Where the traveler’s journey is done;”
Black is used to represent death or evil.
White stands for life and purity.
Red can symbolize blood, passion, danger, or immoral character.
Purple is a royal color.
Yellow stands for violence or decay.
Blue represents peacefulness and calm.
*colors have different connotations in different cultures*
Objects as symbolism
A chain can symbolize the coming together of two things.
A ladder can represent the relationship between heaven and earth or ascension.
A mirror can denote the sun but when it is broken, it can represent an unhappy union or a separation.