Yes. To be a regulation table it must be slate. To be sure you have a consistent playing surface that is similar to that of a regulation table, it must be slate. A pool table can have a different surface but it should not be expected to be idenitical in play as a slate table.
This describes a pool table that has a playing surface of slate, covered by the cloth of coourse.
The playing surface of a good quality snooker table has a bed of slate so it is called a slate bed pool table.
You cannot make the slate for the pool table. It is cut and milled for the table, and then the table manufacturer fixes a wooden frame to the slate and fits it to the table frame. Then the holes are drilled to anchor it to the table.
what it the average weight of a 7 foot slate pool table
This is the large main surface of a pool table. Slate is a stone, so it can be cut extremely flat and does not warp.
Yes, slate is not necessary, but the level of play may not equal to even a cheap slate table.
There are multiple steps to leveling a pool table. The first step is leveling the table structure, which can be done as the table is put together and should only require minor adjust of each leg. Then, after installing the slate, shims are used underneath the slate to complete the leveling.
A 9 foot Gandy pool table uses a fine finished 3 piece slate. There is no pattern specific to Gandy.
This would be around $100 for any 1 inch slate set. Used pool table slate has very little value. It can only be used on a table designed for slate and slate doesn't "go bad". Therefore, there is no market to sell used pool table slate. The potential buyer would be the small retailer, who could then replace slate damaged in handling - and it would be necessary to have a full set of matched pieces to sell it.
The first difference is cost, as slate tables cost more. The second difference is weight, as a slate table weighs more than non-slate. The third difference is "playability". A non-slate table and a slate table that has less than one inch slate will not provide the same tolerances and ball reactions as compared to a quality one inch slate table. This third item is the reason all regulation pool tables are required to have one inch slate.
30 inches above the slate bed.