-something to smash glass
-materials to make an investment mold (wax, investment plaster, flasks, a vacuum sealer)
-something big enough to hold glass over investment at around 850 degrees C
(Please read through the steps first- this materials list is probably not comprehensive.)
I'm not an expert- none of us had tried working with glass before this project. If you have advice, please comment!
Step 1: Make wax pieces
Another option is to copy an existing object using silicone molding and a wax injector. I used mold-making rubber, but here is an instructable for a different way to make silicone molds. Make sure there is an opening from the side of your mold to your object so that you can inject wax with the wax injector. I made several wax copies of a phoenix figurine using the silicone mold pictured.
The objects which cast best in glass for us were the solid figurines, such as the animals pictured. However, some of the more delicate objects (some rings, a phoenix) also came out well.
Attach your objects to a wax sprue.
Step 2: Make an investment
Follow the instructions for your investment mix to properly mix and set your investment.
Put the investment in the furnace to melt out the wax, leaving holes for your glass to fill.