In class writing

The secret of opal's color lies not in its substance but in its absences. --Australian Gepgraphic. Opal was like a dream, a dream which seem like never exit. People came form every country in this world shared a same goal-- get rich. Opal is beautiful and valuable, and it valuable not because it has some special chemical composition, but because it's hard to find and people like unusual things. Opal's color was beautiful, not because opal is a prefect stone, but because opal was unusual, hard to find, and be admit by the society.