A large number of stones used in Semi Precious Gem Stone jewelry are known as semi-precious gem stone; the most important ones are as follow: amethyst, lapis-lazuli, turquoise, aquamarine, topaz, moonstone, peridot, opal, tourmaline, zircon, chrysoberyl, and alexandrite.

Others of Semi Precious Gem Stone less importance although much used are: chrysoprase, jade, garnet, agate, azurite, malachite, bloodstone, coral, carnelian and many others. Semi Precious Gem Stones while comparatively common and inexpensive are indispensable to the worker in jewelry.
 
The variety of colors to be had in Semi Precious Gem Stone, make it possible to produce unusual
designs of artistic merit and to adapt them to the personality and costume of the wearer. Using semi-precious gem stone is one good way to achieve impressive costume jewelry.

Semi Precious Gem Stone come in a huge variety and are highly accessible to almost everyone. Semi-precious gem stone preserve the effect of sophistication.

The beauty of a Semi Precious Gem Stone or gem consists of its color or colorlessness, brilliancy or softness of luster, and transparency. To take a high and lasting polish, a mineral must be hard, --and many stones that would otherwise be highly valued are low in the estimate of worth because they do not possess of sufficient hardness to make them endure the wear and friction to which a Semi Precious

Gem Stone is subjected when used in the form of jewelry. The rareness of Semi Precious Gem Stone has a decided effect in determining their values.

The changes of fashion have much to do with determining the market value of Semi Precious Gem Stone. Amethysts, topazes, cat's-eyes, aquamarines, alexandrite, and even emeralds and opals have been eagerly sought for at times and then again neglected for other gems, causing a sensible
difference in the value of Semi Precious Gem Stone.