You imagine!Some were in NewYork :on the seventh floor of a building in downtown San Francisco, upstairs from the famous jewelry store Tiffany & Co ,more exactly we can find.plenty of gems and diamons that a compagni created in there labatory.Usually, gem stones form below Earth’s surface. They can stay on hearth for many millions  years. But those scientists are creating gemstones on their own. They do this by mimicking the processes that occur underground or by coming up with entirely new processes. Lab-made gems have the same appearance and  structures that the natural ones.Yes you will say that it is only usefull for jellerys but it is not true because , they can be used to make tools, such as lasers and drills. Lab-made diamonds could even help scientists improve electronic devices or detect dangerous bacteria in drinking water.