Altantian Crystal Necklace

I have always been a fan of Disney's Atlantis animated movie, and ever since seeing it i have wanted my own crystal.  This instructable outlines how I made mine. I made two versions of the necklace. One is a cast resin version, and the other is a quartz crystal version.

For the resin version I made the master copies of the crystal and crystal holder out of urethane foam. To make the crystal piece I simply took a couple blocks and sanded it down with some sand paper. For the holder I turned a small chunk on my lathe to get the form.

I then took the parts and made molds for them in Oomoo 25. Pretty straight forward I just used some hot glue and plastic mold boxes taken from around the house. Then I mixed up the Oomoo and poured it over.

The castings are cast in Smoothcast 325 with pigment to change its color. 

I used the same mold I used for the resin crystal holder and made a wax version. Then using the lost wax casting method I made a plaster mold of the wax part.

After melting the wax out of the plaster mold I melted some brass and poured it into the empty cavity of the plaster mold. Once it cooled I dunked the freshly cast piece in water and broke up the plaster.

Once I cleaned the casting up I attached it to a quartz crystal I purchased off of ebay. I added a chain and then the Atlantian Crystal is complete.