Diamonds rubies emeralds and sapphires. These days all gemstones are considered precious since they are all rare and there is a limited supply of them. Aquamarine peridot and cymophane cat s eye held their place in the list of precious stones up to the last century. Except for the four gemstones in the present list precious stones come and go. These terms are based on old traditions from the west.
Green and brown gems from india and brazil tend to be in the bronzite composition range. Tiger s eye and amethyst only fell off the precious stones list in the 19 th century. The brown and green gems from tanzania are enstatites as are the brownish green stones from sri lanka. Often used for jewelry and fashion accents this term was created in the mid 1800 s to refer to four specific stones. Precious stones are defined as visually appealing gemstones created from rocks or minerals.
Precious stones are defined as visually appealing gemstones created from rocks or minerals. Green and brown gems from india and brazil tend to be in the bronzite composition range. Diamonds rubies emeralds and sapphires.
