No difference at all. Just the name. Same with "Cocktail Glass" also being known as a "Martini Glass".
YES
tumbling against other rocks and sand, either in a stream or in a rock tumbler.
classic rocks are not minerals. limestone is
A tumbler glass is shaped so that the base of the glass is also the bottom of its inside. A footed glass, on the other hand, is connected to a base by way of a stem. The length and width of the stem do not matter.
The difference between breccias and conglomerate is that breccias are angular and conglomerates are smooth. What causes rocks to be smooth is transportation, such as when rocks are in a stream and are worn down. Therefore transportation is what causes the difference between breccias and conglomerates.
A rock tumbler is a device to brake down large boulders into smaller gravel. It is a drum that rotates and often has divets or bumps to smash the larger rocks.
monomineralic - one mineral polymineralic - multiple minerals
describe the textural difference between coarse-grained (phaneritic) and fine-grained (aphaneritic) rocks
The difference is in the Garnish. The classic Martini uses olives as garnish where as Gibson uses cocktail onions. Some other difference can be the type of glass served and being served on ice, it differs from bartender to bartender.
Gems are valuable rocks aren't.
A rock is a rock, and a diamond is a gem.
most metamophic rocks contain a high amount of oxygen and silicon