Chatoyant material sometimes yields catseye fibrolites which are also very rare. Amethyst ranges in color from pale lilac to deep reddish purple. All other quality stones are called semiprecious even though they may not be any less valuable or beautiful. The only precious gemstones are diamond ruby sapphire and emerald. Calling a gemstone semi precious does not mean it is less valuable than precious gemstones.
Precious stones were hard rare and valuable. Blue and greenish gems are lovely although very difficult to cut. These days all gemstones are considered precious since they are all rare and there is a limited supply of them. A semi precious stone is also known as a gem or gemstone also a jewel a gem a precious stone which is a portion of mineral which in refined and cut form is used to create jewelry or other embellishments. These terms are based on old traditions from the west.
However certain rocks such as lapis lazuli and opal and occasionally organic materials that are not minerals such as amber jet and pearl are also used for jewelry and are therefore often. Semi precious gemstones any gemstones that is not a diamond ruby emerald or sapphire is a semi precious gemstone. The traditional list of gemstones that are considered precious stones are. The ancient greeks made a distinction between precious and semiprecious gems which is still used. Semi precious gemstones are just usually more abundant but there are a few exceptions.
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Amethyst is the most precious gemstone within the quartz group. Amethyst is the most precious gemstone within the quartz group. However certain rocks such as lapis lazuli and opal and occasionally organic materials that are not minerals such as amber jet and pearl are also used for jewelry and are therefore often. Precious stones were hard rare and valuable. Chatoyant material sometimes yields catseye fibrolites which are also very rare.
