Inca Gold limestone is quarried from a bedrock quarry in the Indus Valley region of Pakistan. Quartz veins and small shells are common in this sedimentary stone as it was formed on the bottom of a shallow sea bed. Because Inca Gold is one of the harder limestones, it has a tight grain structure and holds a very high polish, which is a unique finishing option for this particular stone. As with any polished product, ongoing maintenance will be required. It is a common characteristic for this stone to have voids in the raw material. Before it reaches polishing stages, these voids are filled with a polyester resin. Depending on how deep the void is, the resin may shrink as it dries, which will leave the surface of the filled area slightly lower than the rest. This does not affect the durability, maintenance or beauty of the stone. As a natural stone product, it is recommended that this be sealed to extend its longevity.