Ametrine is formed when tiny iron particles locked inside the matrix of the quartz crystals begin to oxidize at different rates. This is usually due to differences in temperature between the two different parts of the stones. As you can imagine, this is a very unique and unusual situation to occur in the natural world!
Xerophytes are plants that have adapted to live in the dry, hot conditions of the desert. These plants have a waxy outer coating to help the plant retain moisture, along with other adaption of their seeds, roots and leaves to help them thrive and retain moisture for extended periods until water is available.erophytes are plants that have adapted to live in the dry, hot conditions of the desert. These plants have a waxy outer coating to help the plant retain moisture, along with other adaption of their seeds, roots and leaves to help them thrive and retain moisture for extended periods until water is available.
Many desert plants, such as the brittlebush, reduce the temperature of their leaves by reflecting sunlight with a thick covering of hairs. Small leaves are another way of reducing water loss. One of the best examples of a small-leaved plant is the cactus, which has reduced its leaves to spikes. Some desert plants also store water. These include succulent plants, such as aloe and barrel cacti, which have stems or leaves containing spongelike cells that absorb water, and plants with underground storage, such as bulbs and rhizomes.