Simplified Steps
STEP 1: Cut the cuttlefish bone in half STEP 2: Sand soft sides of the cuttlebone until smooth STEP 3: Blow off residual dust STEP 4: Carve a design into cuttlebone STEP 5: Bind the two halves together STEP 6: Melt the metal STEP 7: Pour the metal STEP 8: Remove the hardened metal jewelry piece
It’s better to overestimate because you can always remelt any unused metal. Place the metal into a ceramic crucible and begin heating it with your torch to melt it. Add a small amount of borax as it heats and starts to melt to prevent it from oxidizing. Carefully swirl the crucible as the metal begins to melt until it’s completely liquified.
Once you have liquid metal, pour it into the pouring cone you created. Be prepared to pour the molten metal into your mold immediately. If it cools, it will harden again. To get a nice pour, you don’t want the metal to cool down even a little as it goes into the mold.
Once the liquid metal reaches the top of the opening, stop pouring. The metal usually hardens quickly but stays very hot to the touch for a while. The safest option is to let it cool inside the mold before opening it up.
McGhee likes to open the mold as soon as the metal has hardened and throw finished pieces into a container of water to cool down quickly. However, if you choose this route, be careful as the metal will be hot enough to cause a serious burn. Wear heat-resistant gloves to protect your hands.
You can buy silver castings, sheets and tubes from various sources, but you can save money and practice recycling by purchasing used silver. McGhee buys broken jewelry, sterling silver flatware and other odd pieces of silver from pawnshops or at garage sales.”
WARNING! Cuttlebone puts off a strong odor once the hot metal is poured inside and singes the surface of the cuttlebone.
Moira K. McGhee is an amateur rockhound who loves hunting on California’s beaches for sea glass and Oklahoma’s red dirt plains for rose rocks. Collecting rocks is just one of the many hobbies she’s been fortunate to write about.