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If you're asking what volcanic rock can be sharpened as a cutting tool, the answer is obsidian.
There is no use for molten rock from volcanic eruptions.
Yes
obsidian, a volcanic rock often used in jewelry and weapons, also used for spiritual purposes.
Dacite is a type of extrusive rock that is classified in the volcanic group. This rock is used in construction and building roads.
molten rock because it sturdy and it can keep your fire burning;)
An extrusive volcanic rock which is erupted under water called pumice.
Igneous rocks, which are volcanic rock are often Used as building materials for such things as kitchen counter tops and tombstones, or even just material to construct buildings.
There isn't one!!! At least not any more, there used to be Volcanic activity in Great Britain as can be seen by volcanic plugs like Dumbarton Rock and Castle Rock in Edinburgh.
Volcanic glass, also called obsidian.
Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.Cement or concrete was actually made very much the same way as present day concrete. The Romans used an aggregate which could be of rock, broke tiles, or brick rubble, held together with a binder of gypsum or line. The very best concrete had a volcanic ash or "pit sand" as part of the ingredients.
TUff can be used for construction. it dependes what tuff it is. there are many out there i.e. volcanic ash\ go on wikipedia.org and seach tuff