Hematite is a mineral form of iron oxides and major iron ore. It is harder, but more brittle than pure iron and colors can range from black, to steal gray, to brown to red. There are many different forms of it and the botryoidal variety is commonly referred to as Kidney Ore.
Quartz Geodes are hollow rocks lined with crystals or other minerals. These geodes are formed in gas bubbles trapped in volcanic rocks as hydrothermal fluids deposited minerals inside.
Desert Rose is the name given to a rose shaped formations of selenite (a form of gypsum) with sand inclusions. The “petals” of the desert rose are flattened selenite crystals, fanning out from the cleavage planes. They form in arid sandy environments also known as deserts. The sand inclusions cause the desert rose to take on the color of the surrounding sand. Native American legends say that they are rocks carved into flowers by their ancestors.