What is Gem stone ----Kinds and difference
What is Gem Stone?
Gem stone also named as gemstone, gem, and jewel, is a piece of mineral, which is used to make jewelry or other adornments in cut and polished form. However, some are not mineral but rocks (such as lapis lazuli), or organic materials (such as amber or jet). Usually most gemstones are hard, but some soft minerals are used in jewelry too, as their lustre or other physical properties that have aesthetic value.
How many kinds of Gem stone?
From the following form, I show you a different version that easy to learn there are 90 kinds of gem stone, including precious stone and semi precious stone. As follow are the definitions of gem stones used widely.

Top 10 gemstones
As follows is the top top 10 gemstones of brass jewelry and 925 silver jewelry in order of Hardness.
1. Diamond
2. Sapphire
3. Ruby
4. Emerald
5. Alexandrite
6. Topaz
7. Spinel
8. Zircon (CZ)
9. Garnet
10.Aquamarine
Diamond is the hardest natural element know to man. Even if we know harder materials, they are man made. The diamond is the hardest and the most durable gemstone of all. Yet the list I mentioned above reveals some of the most beautiful gems known to men throught out history, and keeping in mind their long-lasting characteristic and their rarity I think we should stick to wearing gemstones.
Usually, All the above gemstones except diamond will be used in Silver Jewelry and Brass jewelry products, and they are also used in the color description of CZ, such as Garnet CZ, Sapphire CZ.
Edited by Eshine Jewelry ----- Silver Jewelry, Brass Jewelry, Jewelry Manufacturer and Exporter