Igneous rocks are classified according to their texture and composition. Composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock (the two are obviously related). Texture refers to the size and arrangement of the minerals or grains that make up a rock.
Pentatonix (or PTX) is an American a cappella group consisting of five vocalists originating from Arlington, Texas.entatonix began with three friends who grew up together and were schoolmates at Martin High School in Arlington, Texas: Kirstin Kirstie Maldonado (born May 16, 1992), Mitch Grassi (born July 24, 1992), and Scott Hoying (born September 17, 1991).
Pentatonix, together with music producer Ben Bram, won Best Arrangement, Instrumental or A Cappella for Daft Punk at the 57th Grammy Awards.Pentatonix also released a documentary on June 18, 2015 called Pentatonix-On My Way Home, which included clips from their On My Way Home Tour in 2015.entatonix began with three friends who grew up together and were schoolmates at Martin High School in Arlington, Texas: Kirstin Kirstie Maldonado (born May 16, 1992), Mitch Grassi (born July 24, 1992), and Scott Hoying (born September 17, 1991).