how long they stayed in the volcano; how much time the crystals had to form
You can find them online (they don't sell them in stores anymore). Usually you will find them at ebay.com, xmodsinternational.com, or atomicmods.com
4-10 dollars
Pretty much all of them with the exception of things like obsidian, which is a glass and by definition not crystalline. Note that the crystals in question may be extremely small (microcrystalline).
Crystals
where to sell my quartz crystals
Depends on the size. And of course quality.
Yes, it appears that Amazon does indeed sell Swarovski HotFix crystals. The price, however, will depend on what exactly you are looking for in your crystals.
target
Yes They Do Sell Crystals There! =)
go to eBay
Swarovski does have a number of stores that sell under the Swarovski brand name itself. In addition, one can also purchase Swarovski crystals from department stores such as John Lewis or Debenhams. In addition, online stores devoted to selling crystals such as Fire Mountain Gems do also sell Swarovski crystals.
Crystals are about 12 dollars.
sell them
It depends on the size of the crystals and the material in which the crystals. Diamonds are carbon crystals that are obviously expensive when they are large.
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In Pokemon League Cynthia sell laser eyeballs for eyes and butts.