There are two theories about what it is, Grotzinger said. It could be a type of mineral that breaks along a cleavage point, exposing a flat surface to sunlight; or it could be the result of some process inside the soil that results in certain minerals. Scientists "very much would like to study this," he said. The rover's laser eye will zap the shiny material within the next few days to get a sense of what it contains. Then Curiosity will continue exploring the Glenelg region, probably through the end of the year.