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!
Desert: Plants Short grasses, sagebrush, creosote bushes, and cacti are just a few of the plants that can be found in the desert. Plant abundance and variety are determined by the geographic location of the desert.esert: Plants Short grasses, sagebrush, creosote bushes, and cacti are just a few of the plants that can be found in the desert. Plant abundance and variety are determined by the geographic location of the desert.
Kalahari Desert Plants. Because the Kalahari Desert is not technically a desert, there are almost 500 species of vegetation that thrive during the rainy season. Because the soil and sand of the Kalahari retains water better than normal desert sand, the plant life is thriving in some parts. The northern part of the desert is characterized by more dense vegetation while the southern part of the desert is more arid in nature.