Onyxes have straight, nearly parallel bands or layers of color, which allow skilled gem carvers to cut away material to create cameos and intaglios with extraordinary depth and contrast. Onyx is a type of chalcedony, which is itself a form of microcrystalline quartz. Now what you have in the bottom right corner is a mounted disk image that appears when you open a DMG. The latter two are just parts of Onyx separated for people who don't want all of Onyx's features. Onyx is nearly always opaque, whereas obsidian ranges from transparent to opaque. Onyx, Deeper and Maintenance all come from the same developer. Onyx is typically more expensive than obsidian. The Main Differences Between Onyx vs Obsidian are: Onyx has a higher hardness and toughness rating than obsidian. The easiest way to differentiate between black onyx and black obsidian is by lifting them up since onyx is significantly heavier than obsidian. So, while onyx is indeed a mineral with a hexagonal crystal system, obsidian is essentially a black volcanic glass.
How can you tell if black onyx is real?.
