I believe to be Kosher means foods, which apparently include spices, are blessed by a Rabbi, and have nothing to do with how coarse something is, However, the simple answer I believe is yes.
Yes
Not exactly, but for many purposes it's close enough. Kosher salt is salt that has large coarse grains, and no additives.
A coarse grained salt, either sea salt or kosher salt is used, though they also sell Margarita Salt which is a corse grained salt and is probably one of those two.
Many brands of coarse salt are sea salt. However, other salts can be coarsely ground, as well.
Sea salt is a mineral and so long as anything that is non-kosher is not added to the dry salt crystals the salt is kosher. To say that sea salt is not kosher because non-kosher aquatic life lives in the ocean would be the same as saying that all fruits and vegetables are not kosher because they've come in contact with bugs.
May be
Almost all salt is kosher by default. The only issue would be if non-kosher additives such as flavourings were added to the salt. Sea salt is healthier than traditional table salt as the sodium level in sea salt is far lower.
It has no additives and is used to remove blood from meat which is in compliance with the Torah rules of processing meat._______ "Kosher salt" is a coarse grain salt that is used for kashering meat. The large grains of salt means that it doesn't dissolve as quickly as table salt so less is absorbed by the meat. By default, all salt is kosher because it is a mineral. However, additives (most often flavourings) can render the salt not kosher.
It is possible.
Sea salt comes from evaporated seawater. The mineral content of sea salt is not limited to the sodium and chloride that make up the traditional salt molecule. Additional minerals can give the salt subtle flavor characteristics that can enhance foods. But, Kosher salt is pure sodium chloride, usually without any additives, and it often comes in coarse crystals. It is not necessarily a kosher product, but it can be certified as kosher for Passover use. The real connection is that kosher salt has been used in the process by which foods are made kosher. It is no better or worse than any other form of table salt. __________ Almost all salt is kosher by default unless flavourings are added to it. Traditionally, kosher salt referred to a coarse salt that is used during the process of kashering meat.
You can bake bread with coarse sea salt. However, the crystals are large and may taste too strongly in the bread after it is baked.
One can purchase a sea salt body scrub at a home store. One store that sells a variety of these types of body scrubs is Bed, Bath, and Beyond. They can also be found in the hygiene section of department stores.