Jun 25, 2026Discover the 3 main characteristics of obsidian: volcanic glass formation, glassy luster, and sharp edges ideal for cutting tools.

Jun 12, 2026Learn what a depositional system in geology is, including sediment environments and their role in forming rocks like sandstone and shale.

Jun 3, 2026Discover how to identify real obsidian by its glossy, jet-black appearance, sharp edges, and unique fracture patterns.

May 3, 2026Learn key differences between black obsidian and black tourmaline, their textures, and properties for accurate identification and use.

Apr 27, 2026Learn about the typical colors of asbestos rock and the distinct hues of common asbestos types like chrysotile, amosite, and crocidolite.

Feb 14, 2026Discover how heat and pressure can change igneous and sedimentary rocks into metamorphic rocks.

Nov 7, 2025Discover the truth about gold production on Earth. Learn why gold isn't being made today and its origins from cosmic events.