Below you can find the About 2/3 of the earth's crustal rocks are of this type formed from a molten state Jeopardy Words Answer. The answer to About 2/3 of the earth's crustal rocks are of this type formed from a molten state has 7 letters. This clue belongs to the Physical science category and is part of Jeopardy Word Level 866. If you scroll near the bottom you will find other clues and answers part of level 866