All other gemstones are considered as being semi precious stones. The traditional list of gemstones that are considered precious stones are. This article needs additional citations for verification. This is a list of gemstones organized by species and type. Please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed.
Most gem enstatites have indices in the range 1 663 1 673. List of precious and semi precious stones. The brown and green gems from tanzania are enstatites as are the brownish green stones from sri lanka. All other quality stones are called semiprecious even though they may not be any less valuable or beautiful. These are old terms and not necessarily true these days.
The only precious gemstones are diamond ruby sapphire and emerald. The only precious gemstones are diamond ruby sapphire and emerald. Most gem enstatites have indices in the range 1 663 1 673. All other gemstones are considered as being semi precious stones.
