Some well-known precious gemstones:
Most commonly known gemstones are precious as well. What makes these precious are their history. Throughout the ages these stones have been revered by royalty and religious figures. They are traditionally included as gifts for special celebrations such as weddings anniversaries and birthdays.
Popular semi-precious gemstones:
These gemstones are known as semi-precious because of their availability. Not all semi-precious gemstones are stones some are organic materials such as amber and pearl.
Gemstones which come from plant or animal life.
Organic gemstones are produced by living organisms. Pearls are produced by shellfish and amber is a byproduct of sap from trees. These gemstones are not as durable as minerals. Because of this they are generally polished carved or drilled - never faceted.
Lab Created & Simulated Gemstones
These are made in laboratories to mimic the look and feel of a real gemstone using the exact same chemical composition of the natural gemstone.
In many instances it can be difficult to tell the difference between a synthetic/lab created gemstone and the actual gemstone since they have the same chemical composition.
Simulated gemstones are made to match the color and look of the natural gemstone.
They are made out of almost any material. An example of a simulated diamond would be a cubic zirconia.