Olivine has the formulae (Mg,Fe)2SiO4 and a relative hardness of 7. It's name is derived from the characteristic olive green colour. A common rock forming mineral. A clear green variety is called peridot and has some uses as a gem.
Hear it on YouTube. Here's a piece that many people know, and rightfully so! This famous classical piece from the romantic period is one of those pieces that has the ability to make anyone feel happy. Composed in the 1920s, for a ballet, the piece was an instant success.
Black Bottom (dance) Sheet music for the new dance sensation, the black bottom. The black bottom is a dance which became popular in the 1920sâthe Roaring Twenties, also known as the Jazz Age, and the era of the flapper. It was danced solo or by couples. Originating among African Americans in the rural South, the black bottom eventually was adopted by mainstream American culture and became a national craze in the 1920s.