Absolutely not.
The marbles, because they cannot be digested, can get trapped in the wavy linings of your intestines, causing a gas and pressure build up which can lead to serious internal complications, such as splitting intestines.
Your stomach acid may also slightly corrode the surface of the glass, making it slightly sharp and therefore putting you at risk of shredding yourself inside-out.
It is not normal to swallow objects such as glass balls.
No it's not safe
I have been swallowing marbles and glass gems for over a month now. Start with one marble and simply swallow it with water as you would a pill. Work your way up to larger amounts to avoid nausea. Be careful as the marbles will clog your toilet. I use cling wrap and vinyl to retrieve swallowed objects. Please do not swallow metal, especially magnets, because you can do great harm to your body. Think hard about why you want to swallow marbles in the first place. The behavior can be dangerous and addictive. Personally, I swallow marbles as a form of hunger control. I've lost quite a lot of weight by filling my stomach with non food items.
One possible way to separate wooden marbles from glass marbles is by using a magnetic field. Since wooden marbles are typically not magnetic, while glass marbles are also not magnetic, one can use a strong magnet to attract and separate the wooden marbles from the glass marbles. The magnet will attract the wooden marbles while the glass marbles will remain unaffected and can be easily sorted out.
Glass.
Marbles are usually made of glass( The kind you play with).
because ages ago they used to use marbles instead of glass balls.
They were made of glass and poorer Victorians had clay marbles.
CaCO3 (Calcium Carbonate)
It varies; depending on the size of the marbles
Marbles are named because of their function and not what they are made of. Marbles can be make from any substance that holds a spherical shape.Now, and historically, marbles have been made of Glass, Ceramic and stone etc.The most common substances used are the ones which have useful weight.
Marbles originated in ancient Rome and Egypt and were made from marble (rock). However this was expensive so people tried to find alternatives and in 1846 a German glass blower invemnted a marble made from glass.
I thought marbles were made of glass. But try Agate, a silica mineral.
You have to pick them up