Other contributors have said "How many different types of crystals are there and what are they?" is the same question as "What are the different types of crystals?" If you believe that these are not asking the same thing and should be answered differently, click here
Simple Prisms A hexagonal prism is the most basic snow crystal geometry (see the Snowflake Primer). Depending on how fast the different facets grow, snow crystal prisms can appear as thin hexagonal...
It depends on the salt in question. Table salt, sea salt, iodized salt and other 'salt' you normally consume are merely sodium chloride crytals (NaCl) arranged into a regular ionic cubic lattice with...