Agate is a very fine grained form of Quartz. It grows within volcanic lava bubbles known as geodes. Diamond saws are used to slice the Agate it is then ground to remove any imperfections then polished and dyed to enhance and display the beautiful natural banding within.
 
Please Note: Natural gemstone or semi-precious stone comes from mineral. Due to the naturality, the stones may have a tiny flaw. Meanwhile, cutting or polishing also makes every piece of gemstone vary in colour and size.