No they are no longer a fad but whatever is your opinpion.
People usually have pet rocks if they do not have pets. If they have pets and a pet rock, then they either do it for fun or they just are bored.
Not all rocks do cool and crystallize, your question is meaningless.
The term 'sold pet rocks' is a predicate, a verb and the words related to that verb. The compound noun 'pet rocks' is functioning as the direct object of the verb 'sold'.The only thing missing to form a complete sentence with this predicate is a subject, for example:I sold pet rocks.We sold pet rocks.You sold pet rocks.He sold pet rocks.She sold pet rocks.They sold pet rocks.Everyone sold pet rocks.
igneous rocks
No.
your backyard
Igneous rocks that cool quickly beneath earth's crust are known as intrusive rocks. These rocks will form from magma which will cool and solidify quickly.
Lava.
No, sedimentary rocks are deposited and undergo lithofication over time. Igneous rocks cool and crystallize
Igneous rocks.
Intrusive igneous rocks cool slowly. These types of rocks would be located underground having long period of time to cool.
Its a clothing store for pet rocks!!!!!!!!!!!!!!!!!!!!!!!!!!!