03/04 Cuttlefish Bone and Gravity Casting


10 In Stock


Saturday, March 4, 2023 
10:00 am - 1:00 pm PST

Instructor: Jennifer Stenhouse

Beginning to Intermediate Levels

All classes include the video recording, which you will have access to for 30 days after the class. Zoom link and instructions for joining the call will be emailed 1 day (24 hours) prior to class.

The class supply list is below and contains links to buy the supplies you need.

The cuttlefish bone (or cuttlebone) has been used since ancient times as a mold for casting. It was popular as a mold material up to the time of the invention of vulcanized rubber, which took its place as a primary mold in the jewelry industry. Nowadays, most reusable molds are made of silicone or rubber. Cuttlebone is still continued to be used as a mold material, ingot mold, and for creating unique designs. We will discuss other types of gravity casting using other materials like soft charcoal blocks, tufa, and sand.


Supply List for Students

The links below will take you to RioGrande.com or other suppliers. To see prices for precious metal items, you need a free Rio Grande account. Registered Little Metal Foxes students can access Rio Grande wholesale pricing for significant savings. This site may contain Amazon and other affiliate links. If you purchase something through the link, at no cost to you, we may receive a small commission on qualifying purchases.

Materials for Cuttlebone casting:

  • Cuttlebones: these can be purchased from pet shops, bird suppliers, and some jewelry suppliers. I get my medium to large bones from Great Companions online.
  • Metal: Scrap sterling silver from your studio or buy an ounce of sterling casting grain
  • Pencil

From your local hardware store:

  • Thin iron binding wire (20-24g,)
  • Dust Mask
  • Coarse sandpaper
  • Sand, pumice rocks, solder bricks, or clay kitty litter to hold cuttlebones propped up securely while casting
  • Carving tools like an X-acto knife or dental tools
  • Borax (20 Mule Team is available from the grocery store on the laundry detergent aisle.)

Metal and jewelry tools:

Casting tools:

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