Sri Lanka is world famous for its gem wealth, but the actual extent of the deposits has never been determined. Recently, a geologic survey team gathered field data in order to compile the first gem prospectors' guide map of Sri Lanka. Using the criteria of lithology and topography, stream-drainage density, presence of alluvium, and the nature and abundance of heavy minerals, this team determined that approximately 20% of the land mass of Sri Lanka may be gem bearing. They also characterized the potential of specific regions.
Sri Lanka is world famous for its gem wealth, but the actual extent of the deposits has never been determined. Recently, a geologic survey team gathered field data in order to compile the first gem prospectors' guide map of Sri Lanka. Using the criteria of lithology and topography, stream-drainage density, presence of alluvium, and the nature and abundance of heavy minerals, this team determined that approximately 20% of the land mass of Sri Lanka may be gem bearing. They also characterized the potential of specific regions.
