Hi! I've decided to see what this antique light shade might be worth. Any help or advice would be appreciated!
From what little I know about stained glass , that type of colored slag glass is more expensive than it used to be. That said....it looks like a 1970's shade .....of no great value. look here... http://www.goantiques.com/slag-glass-shade-2073771
I agree 70s. Yours is nicer than the one link at go antiques. The metal connrctors on yous say newer as shiny rather than the duller lead for older construction. The work involved in your pattern/design would show a higher level of skill. The goantiques looks like a craft kit to me. In the 70s there were craft shops wher you could buy the cathedral glass, channels and get help with the cutting for the design. Cutting that style glass is not easy and takes a little practice to do right. If you check "stained glass" lamp shade, a collector/decorator term, you will find a wide range of quality.
I am not saying you can not get or use old looking lead in things made yesterday. This piece has has a lot more skill and detail than OPs shade. For me the appearance of being made as a window "sun catcher" would call for investigation. The same with the shinny lead. I also recall the "make it yourself" craft shops of the 70s for that style of stained glass work. Put it all together and I would want evidence of age more than mere appearance to have more than an opinion. Also the totem pole design would have me asking questions.
The surface of any lead can be oxidized to look old in a few minutes. as mild an acid as lemon juice should age it nicely.