Sphere shaped crystals are what you might commonly think of as 'crystal balls'. Unlike points or other shapes, they allow the energy to radiate out of all sides. So there is no direct point where the energy emanates. This is perfect to use on an altar during ritual, or to hold in your palms during meditation.
Obsidian is formed from volcanic lava. It has a glossy, shiny black surface that reflects all around it. Obsidian calls us to look inside ourselves. It reveals our darker, shadow side that we might not always want to see. It is also a very protective stone that reflects negative energy away from us. This is the perfect stone for empaths. Instead of taking on other people's emotions, feelings and energies, it blocks them from entering you. It can also be used for scrying and can be used in a more 'crystal ball' kind of way. This particular obsidian is 'gold sheen' obsidian. It appears black but in the light has a gold sheen. Use it to get to the root of any problems you find when looking inside yourself. Manifest your future and align with your highest self.