Yaltemoku emibalu እንቁ ነዉ $18 mnamn dollar yawetal guram

Black obsidian rock newe Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica, giving them a high viscosity. The high viscosity inhibits diffusion of atoms through the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava.[5] Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgical scalpel blades.

Obsidian meslej, its formed from volcanic eruptions,.....I know it from Minecraft😁

It is called an obsidian It is igenous rock What more do you wanna know?

ድንጋይ ነው