>>275687190% of what you find outside on the ground will be Quartz, Jasper or Agate and often a bit of flaky Mica. Jasper and Agate are extremely similar, agate will often have more translucence or the ability for light to shine through it. Jasper is almost always 'shiny smooth with no translucence' and agate is almost always 'rough but translucent'. There are many different types of 'named' jasper that are all extremely unique looking and so you can easily tell that is that type of jasper - although you finding a particular kind of jasper in your back yard is extremely unlikely as they usually have specific pockets.
Certain types of jasper were really abundant back in the day and now they are becoming valuable because the sources have been exhausted. Other types have a trade name and that trade name is only applied to certain material that came out of specific mines (for marketing purposes) like the Tiffany Jasper out of Utah, which has gone through many phases of 'Oh this is all we're gunna get of Tiffany Jasper!!!' and then next year they find another 'pocket' right next to mine they were about to 'shut down'
