Precious Stones: Parameters Used To Access The Value Of These Gemstones

Precious stones are special types of rocks or minerals that are used to develop various form of beautiful and expensive jewellery. Before to use in jewellery, these precious stones are cut, polished and design to form in beautiful shapes and sizes. Precious stones are also known as gem stones. They can occur both naturally or can develop artificially in labs.

Artificial precious stones are generally less expensive when compare to natural precious stones. Natural precious stone can further be characterized as organic precious stone such as Amber, Jet etc. Amber is made up from fossilized tree resin while Jet is a type of coal. Precious stone can also characterize on the basis of their hardness. Some stone are too hard while some stone are soft. Some precious stone are too soft that they can’t be used to develop jewellery such as single-crystal rhodochrosite.

Precious stone can also be characterized on the basis of their chemical composition such as diamonds are made up of carbon. Precious stones also be put into different group of species such as emerald is a type of mineral species known as beryl. On the basis of these different characteristics (characteristic such as refractive index, dispersion, hardness, fracture, lusters etc.), value of these gemstones can be access by different jewelers.