Salt and ice are two common mineral crystals.
They already are molecules but they all form crystals.
Not enough information. Some crystals will break if they cool rapidly, some crystals will not form correctly if the solution cools too quickly.
cuz they are mota
how long they stayed in the volcano; how much time the crystals had to form
There are almost 40 different minerals in this group called micas, and their common characteristics are a) they are phyllosilicates, and b) they have perfect basal cleavage, and c) form monoclinic crystals. In the hand sample they are glittery and some are coloured. Have a crack at the article Micas in wikipedia.
Most naturally occurring metals crystallize. Diamonds are a form of carbon which also occurs in crystal. Quartz crystals are common.
Common household items that begin with the letter r:radioraincoatrefrigeratorrevolverribbonringroberougeruler
lysol
some lightbulbs
When plants ooze liquid droplets out of their leaves that's called guttation.This dries in the form of crystals.The crystals are nothing to worry about. It is sugar crystals. Some plants produce this as waste.It can mean the plant has been overwatered, so the plant tries to get rid of the extra water,then it will dry in the form of sugar crystals. it's not something to worry about.Try just washing the plant and it should come right off.
be cause they are kept in the freezer which can from snow and ice
They cool to quickly for crystals to form.