Carat, Cut, Color, and Clarity
Precious and Semi-Precious Stones
There are all kinds of naturally occurring gems on Earth. They come in all different colors and patterns, and can be cut into all sorts of shapes and sizes. Gemstones are also referred to as precious or semi-precious stones. These substances are very beautiful on their own, but of course the naturally occurring mineral will look quite a bit different once it has been cut and polished.These are usually used in jewelry, such as in a non conflict diamond engagement ring, but small sculptures and statuettes can be made from large pieces of these minerals%u2026but art like this is quite expensive to purchase as well as to make in the first place. Most of the stones used in jewelry are hard, but some soft stones are used as well because of their own aesthetic qualities.
Gemstones are identified by several different characteristics including the chemical composition, their crystal system, and the form that the mineral it is usually found in.
For example, the chemical composition of a diamond is carbon, while rubies are made up of aluminum oxide. The crystal system is how the molecules are arranged; this can be cubic, trigonal, monoclinic, or (in the case of diamonds) octahedronic.
Gemstones are further classified into different varieties and species. One such species is Corundum, which includes sapphire colored minerals, and rubies. Another is beryl, which includes emeralds, aquamarines, bixbite, goshenite, heliodor, and morganite.
There is no universal grading system for gemstones with the exception of diamonds. Back in the day, these gems were examined with just the naked eye, but the Gemological Institute of America (GIA diamond rings) introduced 10x magnification so that experts could see inclusions and blemishes that were otherwise invisible.
"The Four C's" is a mnemonic device developed to help consumers understand the grading system; Carat, Cut, Color, and Clarity.
Amber is not technically a mineral, but it is still considered a gemstone. This substance is made from tree resin (although many people think it is hardened sap), which was at one point a soft and sticky liquid that was, truthfully, analogous to sap. Sometimes you will even find bugs inside!
Part of what makes gemstones so expensive (aside from the obvious fact that they are rare) is the skill involved in cutting them. Some stones are easier to cut than others, some simply need to be polished, but others need to be cut in a very specific way in order to get the most out of them.
Diamonds are supposed to glitter and sparkle. In nature, a diamond will not do this; it is all an effect of the way it is cut and polished that makes best value diamonds. The cut is intended to make the diamond separate white light into its colored components, cut the light into small pieces, and give it back to out eyes. This is done by closely following the diamond's facets.
The value of most gemstones will go up and down over the years, depending on what is considered stylish and also depending on culture, however some gems such as the diamond and the ruby.






