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? the internet on April 20, 2013. According to Jessica Sager of PopCrush, it picks up where the original song left off. Sager wrote that the song "likely isn't about [Marc] Anthony — but for those new to the song, it's surely easy to interpret it as such. Lopez gets pretty revealing in the new song, addressing a divorce directly and explicitly". Credits adapted from the liner notes of "Love?". (What Is) Love? "(What Is) Love?" is a song recorded by American entertainer Jennifer Lopez. Originally entitled "What Is Love?", the song appeared on the soundtrack to "The Back-up Plan" (2010),