►Black Obsidian displays a silver-grayiridescent sheen when polished and viewed in strong lightcaused by gas bubbles aligning across the layers during
formation.It is an extrusive rock meaning it formswhen lava comes out of a volcano and solidifies above the Earth's surface.It can form along the edges of alava flow,a volcanic domeor along a dikeIt can also form when lava comes in contact with air or water.
SHIPPING INFORMATION
Based in Hong Kong. The shipping time is 7-9 days, package will not generate tax
