All salt is technically sea salt, but the harvesting and refining processes can differ greatly. Salt is made up of Sodium Chloride, but the flavor differences can be from environmental influences or from human influences.
The history of salt is fascinating! Believe it or not, salt has been used longer than history has recorded! Salt is one of the elements that have appeared in the history of almost every other country. Salt has been used for trading, for health, for religion, for status, and for preserving and flavoring foods for years! Now days, salt is still used for health, but also for gardens (Epsom salts), cleaning, ice-melting, cosmetic, spa, and culinary applications.
Salt comes in many different forms, such as flake, fine, coarse, and brick.
Flake salt is processed in a way that the salt appears to look like snow- "flakes". This type of salt is most often used as a finishing salt right before service.
Fine Salt is the salt generally used for baking, as it distributes evenly throughout the baked good. It is also the form of many sea salts and table salts.
Coarse Salt is great for putting in a grinder, providing fresh ground sea salt. Salt in this form is good for high humidity or long storage, as it is not as susceptible to clumping due to moisture.
Ok, now onto some salt varieties...
Blue Salt comes in one variety - Persian Blue Salt. Blue salt is the rarest of salts, blue-flecked in appearance due to compressed, fractured crystals. Interestingly enough, the salt is not actually blue - it only appears blue. Harvested in Iran, this salt is highly prized for its taste and appearance.
Pictures courtesy of SaltWorks, Inc. Check out their website for some great salt varieties!