The number of Atoms must be the same on both sides
This magmatic rock consists of volcanic glass (SiO₂,MgO,Fe₃O₄). It is the homogeneous volcanic glass with small water content. Therefore obsidian is very brilliant. In the ancient time made mirrors of it.
Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper, the other being Cu2O or cuprous oxide. As a mineral, it is known as tenorite. It is a product of copper mining and the precursor to many other copper-containing products and chemical compounds
