These inserts create a center geode shaped cavity in our modular molds.

While these inserts are completely modular and interchangeable between our modular and silicone molds, below shows the sizing they were initially matched with.

Small Geode Insert: Normally used with our 12x15 Modular geode molds
Medium Geode Insert: Normally used with our 16x16 and up Modular geode molds

Silicone inserts can be used in normal silicone molds or our modular molds to created negative space withing your casting. As long as they are clean then a small bit of pressure as you place them is all it takes to keep them from moving.

Our silicone inserts match the shapes of their parent molds so you can use these inserts to create a negative in your cast, remove the insert and place in a resin casts from any of the parent molds.

Amy from Alv Art Studio utilizes this method heavily and creates beautiful works of art. Check out some of her work here to see more examples of these in use.