Mint green lamp w/ crystals and 3 light settings heavy and ornamental

I bought this lamp in a little store in Hoqium, Washington about 12 years ago. I paid $350.00 for it. The gentleman had turned his front room into an antique store. I saw the lamp sitting in the window as I drove by this rainy, gloomy little town and immediately thought ...that lamp is beautiful and I made a U-turn and so the story goes. I bought it. I don't know anything about it, except I think it is gorgeous to me. It is approximately 47" tall and is very heavy. It is some kind of ornate iron. Which is pretty detailed. The light on button is located at the base of the lamp. It will ligth just on the bottom or in the middle or just the top or you can have all 3 levels lit up at once. I would like to know if any body knows its origin or maybe where it came from. I do know that Hoqium (town) is an old fishing and logging town that dates way back. Thanks for any help here. The color is kind of a mint to light teal color.