Most important artificial stones: There are more than 4000 minerals on our earth. You will probably never see many of these minerals in real life. Thanks to the geological process of the earth there are many beautiful, bizarre and precious minerals and precious birthstones for all months. You may never have heard of some. Crazy names such as Amegreen , Amazonite and Amblygonite, for example, are searched quickly in the search engine because you do not know what it is exactly. And those are just three random examples from the list of all gems with the letter A. Below is a top 5 most expensive gems sorted by carat and by type.

Mineral or gemstone

Minerals can also be used as a gem. This is determined on the basis of the chemical structure, the structure of the crystal, the refraction and what the stone looks like. Often the fewer imperfections and the rarer the gem, the more expensive it is.

Most expensive gems, a top 5.

Below is a list of the most expensive gems, sorted by number of carats. The estimated average value per carat has been converted in January 2019. One can choose the best birthstones for each month according to their requirement.

5. Diamond

Diamond is perhaps one of the most famous gems in the world. The stone consists of carbon and is widely used in wedding rings and other jewelry, for example. Diamonds are known for the many useful applications, strength and hardness. They are very expensive gems.

4. Serendibiet

The chemical formula of serendibite is (Ca, Na) 2 (Mg, Fe 2+) 3 (Al, Fe 3+) 3 [O 2 | (Si, Al, B) 6O18]. Something you will not easily memorize. It is an incredibly rare gem and mineral that was originally found in Sri Lanka around the year 1900. Recently it has also been found in Myanmar.

3. Grandidierite

For a carat grandidierite you can easily get almost twenty thousand euros. The stone was first discovered in Madagascar. The stone is very rare and has a distinctive blue color.

2. Taaffeite

Taafeite is a gem that looks very much like the mineral spinel. The stone was first discovered after it had already been polished in Dublin, Ireland. The stone is one of the rarest stones in the world and can be found in small quantities in Sri Lanka and Tanzania.

1. Red diamond

Even though the 'normal' diamond is in 5th place, the red diamond is even rarer and more expensive. In total - at the time of writing - only 30 red diamonds were found. The largest red diamond is the Moussaieff Red Diamond . This was sold in 2011 for 8 million dollars.

Therea re also other gemstone which have great value in the market like best cubic zirconia  and synthetic star sapphire

Cost of gems tone:

Cost of different gemstone  is different and it changes with the time. Like white topaz price is very hifg compare to rhodolite garnet value.