Strip mines,Openpit mines & shaft mines
There were many types of mines used in World War Two. Magnetic mines were some of them.
Open cast mines, coal mines, silver mines, land mines.
Diamond, Coal, Salt, etc.
The Confederates used two types of mines, they were either self acting ones or ones controlled as Samuel Colt had experimented with. The self acting mines exploded on contact when a vessels hull came into contact with it. The controlled mines were set off from shore by a concealed observer. When a targeted Union vessel came close to the mine's location, a switch was clicked on and the mine exploded. Most of the Confederate mines were of the self acting types.
Yes, there are gold mines and yes, there are diamond mines. The two resources have not been mined from the same mine.
Textile Factories, Mines.
No Diamond mines in Missouri, there was volcanic activity and all the conditions exist for the formation of the diamonds but none have been found. There are many other types of mines in Missouri from Limestone to Lead.
There are several different types of mines. Some are cut on the surface and are dug hundreds of feet downward. Other mines are shafts and drifts that sometime go for many miles through solid rock.