As much effective as the ground penetrating radar may, it cannot show the exact elements of the material which it is displaying on the radar. However, it gives you the idea that some material which it has found is different from the materials in its surroundings. Due to this reason, the person could not be sure that the material he has found is gold or piece of plastic and this is why it has not been in the use for the search of the important treasures like gold and gems.
Although just because the ground penetrating radar cannot find the gold and other gems it does not mean that it is not useful and could not be used in the search of the things which will certainly hold more value than the gold. Where the ground penetrating radar could find the clay pipes, metals, conduit, water boxes it could find many other things such as the gas, oil, underground reservoirs of the water and power. Not only this, it could locate the fiber optics underground, the buried resources of the wood, holes made by the man, the voids and many other things which could be very much important in the study of different domains such as the structural analysis, geo technical and environmental analysis.
Not only could the people from the above-mentioned domains could use this to get help in their studies but it could also be used by the department of the law enforcement to locate various kind of bombs, drugs and weapons which could be buried underground. However, the most important question that comes forward in the case of the ground penetrating radar is that what is the range of the device which means how deep in the ground can it search for the object. The answer is not one because there are different kinds of the ground penetrating radar which vary in their range and because of their range, their prices vary also. You must have the ground penetrating radar which is according to your need and when you are certain that the depth it is detecting is more than enough for the objects you are looking to find. See this page to find out more details.
However, from the structural point of view the range of the ground penetrating services depends on the number of factors which include the antennas and its frequency, the type of the soil on which it is used and the size of the object which is targeted.