In this picture we can see the selling of stones at the Tepozteco avenue at Tepoztlán, Morelos, Mexico. In the foreground from left to right, over a blue tray we can see big black stones with their respective selling price written in green labels; on it's right side, a red tray contains elongated gray stones. At the background, different wooden boxes are shown; from right to left we can see sorted stones from the darkest to the clearest. Each of this stones have their significance.