Silver Colored Boulders A comprehensive listing of the most common boulders sold in the landscaping industry in the Western And Southwestern USA, group the color range of green. Boulder prices are usually shown price per ton FOB the quarry location. The color tones in these selections range from pure silver, silver-grey, and silver with other colors. Silver and Silver-grey colored boulders are not very common rock and a hard material to procure in landscaping. There are very few locations throughout the West and Southwest where deposits of silver colored rock are quarried. The geology of silver and silver-gray boulders is usually that of quartzite, schist and granite. Note that the product description will read Boulder Name Quarry location and Geology We deliver boulders throughout the USA. We can ship 1 small boulder or a whole trailer load. Keep in mind that trucking ranges from reasonable to very costly. Boulders for other regions can be found here on the web pages for those states.