Here are a few work-in-process pictures of a project I'm working on. It is a glass sewing machine.
I have a friend that sews a lot, and one day, we were joking about making a glass sewing machine. The more I thought about it, I figured, "Why not?"
I started by modeling the sewing machine itself in clay, which I mounted onto a wood plaque. From that I made a brush-on latex mold with a plaster mother mold.
From the latex mold I pulled a wax positive, which I invested in a plaster/silica investment. I them melted out the wax, filled the investment mold with glass, and fired it.
This is still a work-in-process, as I still have to finish polishing it and to fabricate a base.
It is one solid piece of clear glass. The dimensions are aprox. 9.5x6.5x3", and weighs about 7.5 pounds.
Glass takes on different appearences depending on the light. Here's another picture with different lighting.