Petrography lower if wholly or partly vitreous. The specific gravity of the more common rocks range from about 2.5 to 3.2. Archaeologists use petrography to identify mineral components in pottery. This information ties the artifacts to geological areas where the raw materials for the pottery were obtained. In addition to clay, potters often used rock fragments, usually called "temper" or "aplastics", to modify the clay's properties. The geological information obtained from the pottery components provides insight into how potters selected and used local and non-local resources. Archaeologists are able to determine whether pottery found in a particular location was locally produced
What Is Love An official music video was released directed by Soulvizion. It features the Dutch professional basketball player Don Rigters who plays the role of David Rose, a basketball player who is severely injured trying to make a comeback to the game with encouragement from his girlfriend, (played by Melissa Kanza), his three teammates, (Alkenah Wansing, Jeroen Jansen and Lindy Chippendel) and by his basketball coach (played by J E Rigters). What Is Love "What Is Love" is a song recorded by Trinidadian-German Eurodance artist Haddaway for his debut album, "The Album". The song is recognizable by its refrain "What is love?