The orange specks I'm seeing, appear to be on the surface, and rather similar to lichen. Gold will be a very mellow color, and in the sun a warm rich tone. In quartz the gold should be down in the cracks and fissures, rather than across the surface. The gold may be visible on the surface, yet the gold should extend into the matrix. This quartz you have here appears to be a good possibility for bearing gold and there may be gold present. However, in the photos I'm not able to see anything that can be called gold with certainty. Have you tried a metal detector on this? Generally if one can see gold near the surface of a quartz specimen, there is more hiding inside. Most good quality newer metal detectors will pick up even fairly small amounts of gold when close to the coil.
The photo below is an example of one of the quartz specimens I have recovered. The gold is the yellow vein in the center. The reddish-orange is iron oxide staining. The green is surface lichen as the piece was discovered exposed on the surface of a tailing pile. This piece bangs out loud and clear on a metal detector, even set in low discrimination mode.
CC Hunter