Seeing pebbles in your dream is generally considered a symbol of people, children, or wealth. It suggests that you are able to retain valuable things, such as knowledge or poetry. Pebbles can represent your intellect and creativity, reflecting your thoughts and emotions. This dream indicates your interest in learning and the depth of your thinking.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Pebbles" (page 323).
In a dream, pebbles represent men, women, little children, or counted
324 IBN SEERIN'S money. They also mean memorizing a book of knowledge, understanding it, knowing it by heart, or writing poems. They also mean performing one's pilgrimage to Mecca and pelting stones in the valley of Mina at a placed called Jamarat. Pelting stones in a dream also means harshness, toughness, slander, or youth. Collecting pebbles for pelting from a marketplace, a street, under the trees, or in a farmland in a dream means receiving financial benefits. Collecting pebbles at the foot of a tree in a dream means receiving a gift from a person in authority, or profits from the sea, learning at the hand of a good teacher, a gift from a wealthy wife, or they could mean the birth of a son if one does not have a son. Throwing pebbles in the sea in a dream means wasting one's money. Throwing pebbles in a well in a dream means benefiting from a marriage or a business. (Also see Gravel, Pelting stones)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.