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.
The oldest metal object found in the Middle East consists of copper (it was a tiny awl dating back as far as 5100 B.C.). The U.S. penny was originally made of pure copper (nowadays, it is 97.5 percent zinc with a thin copper skin).Copper ranks as third-most-consumed industrial metal in the world, after iron and aluminum, according to the U.S. Geological Survey. Pennies were made of pure copper only from 1783 to 1837. 2  For most of the coin's history, it has been made of bronze (95 percent copper, with 5 percent tin and zinc). 3  Today, pennies are 97.5 percent zinc and 2.5 percent copper. 4  People need copper in their diets.