Buyzụta eke nwere ike ịmịcha mmiri oyi n'ụlọ ahịa anyị
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. With cristobalite inclusions
A na - emepụta ya mgbe felsic lava extruded si n'ugwu ọkụ gbazee ngwa ngwa na uto kristal dị ntakịrị. Anyị nwere ike ịchọta obsidian ọtụtụ n'ime akụkụ nke rhyolitic na-asọ asọ. Ọ na-ahụ anya. Ebe ihe mejupụtara chemical (akwa silica ọdịnaya) na-adọta elu viscosity. Na ogo polymerization nke onwe. Mgbochi nke ikuku mpi site na nke a dị egwu. Na polymerized onwe na-akọwa enweghị enwe ngwugwu. Otú ọ dị, ndị na-ekiri ihe na-esiri ike. N'ihi ya, ọ na-agbawa ya n'akụkụ ọnụ. Anyị na-eji ya n'oge gara aga na ịkụcha ihe ma na-adọkpụ. E jiriwo ya mee ihe dịka ọkpụkpụ akpụkpọ ụkwụ.
Obsidian is mineral-like. But not a true mineral. Because as a glass, it is not crystalline. In addition, its composition is too variable to be classified as a mineral. It is sometimes classified as a mineraloid. Though obsidian is usually dark in color. Similar to mafic rocks such as basalt, obsidian’s composition is extremely felsic. Obsidian consists mainly of SiO2 (silicon dioxide), usually 70% or more.
ọcha obsidian na-agba ọchịchịrị mgbe niile. Ọ bụ ezie na agba dị iche. Ọ dabeere na ọnụnọ nke adịghị. Ígwè na mgbanwe ndị ọzọ. O nwere ike inye obsidian a dark brown to black color also. Very few samples are nearly colorless. In some stones, the inclusion of small, white, radially clustered crystals of cristobalite inclusions in the black glass. Produce a blotchy or snowflake pattern: snowflake obsidian. Obsidian may contain patterns of gas bubbles. It remains from the lava flow. Aligned along layers. It created as the molten rock was flowing before being cooled. These bubbles can produce interesting effects. Such as a golden sheen: sheen obsidian. Inclusions of magnetite nanoparticles caused an iridescence. A rainbow-like sheen: rainbow obsidian.
Natural snowflake Obsidian