I guess there isnt any, but in my experience, there is no noticable difference from different blends of changa and pure DMT, atleast not to me, unless there is salvia divinorum in the changa, which there often is, people cut their changa with salvia and pass it off as the real thing, atleast here in scandinavia, when i get that type of blend there is a major difference, but from one herbal mix to another its more or less the same, to the degree dmt trips can be the same
Copper has been used and cherished for around 9,000 years. Pots that are made of copper are ideal heat conductors; the material is durable, hygienic and corrosion-resistant. Above all, it is the excellent heat conductivity that makes copper a perfect base material for pots and pans.
United States coins are made out of a few different types of metals. Pennies (1-cent coins) are made of copper and zinc. The zinc is actually on the inside, so we only see the copper color on the outside! A nickel (5-cent coin) is made out of copper and another metal that is called nickel. That should be pretty easy to remember! Dimes (10-cent coins), quarters (25-cent coins) and half dollars (50-cent coins) are made of three really thin sheets of metal that get pressed together. The outside layers of metal are copper and nickel.