Questions with the keyword 'crystal'

• You say that you ask “why do crystals do what the do” but what is it that a crystal actually does ? by justcallmex to Andrew Comments: (No comments so far )
• Why are the substances of which crystals are made of have pretty colours? by 08walkerb to Andrew Comments: (No comments so far )
• What type of crystal is your favourite? by lisaspencer to Andrew Comments: (No comments so far )