This means it comes in blobs. Another botryoidal mineral is malachite , where the layering of the blobs give its distinctive stripes of different shades of green. Crystals are the most famous of natural mineral shapes. Quartz is what most people think of when they say crystal. The crystals have six parallel sides and then, at one end, slope towards a point or a short edge right at the top.
All faces are very smooth and shiny.
Indeed, it's hard to believe that this is natural. Sometimes quartz crystals are packed together so you don't see the parallel sides, just the point at the top, like this amethyst . It is easy to think that crystals must be transparent or translusecent, and must be long and thin, coming to a point. There are other crystals apart from quartz that can look like this, such as calcite on the left. The specimen on the right is stibnite .