Geode Mold 80 or 100mm


Flexible & durable Use with variety of materials
Re-use up to 30 times Use between -53°C ... +232°C (-65°F ... +450°F)

Silicone mold for epoxy resin and polymer clay for making 2 size geode-shaped castings. Suitable for creating coasters, decorations.


This mold has one cavity in a shape of an agate cut, a segement for 1/4 of the circle or 1/6 of the oval.

You can choose the size of the lens in options. Item made with this mold has the following dimensions:

  • Size: 80-87 mm (3 1/8″…3 1/2″)
  • Thickness: 8 mm (5/16″)


  • Size: 100-110 mm (4″…4 3/8″)
  • Thickness: 10 mm (3/8″) 

There is an option to order bigger size with smaller thickness (these molds are marked as “thin” in the drop-down menu):

  • Size: 100-110 mm (4″…4 3/8″)
  • Thickness: 6 mm (1/4″) 

Surface: front main surface is glossy. The surface might have small imperfections. The side surfaces are glossy. If you need a texturised side surface which makes the sides look more true to life – message me about it, please.
The color of the silicone will be green or blue.
Weight of epoxy resin to fill in the mold (A-M shapes, 100 mm): approximately 100 gr = 100 ml = 3.4 oz.


All of our silicone molds are flexible, resistant to tearing, and are durable in use.

You can use silicone molds with the following materials:

  • Resins
  • Epoxy resins
  • Polymer clay
  • Soap
  • Wax
  • Low-temperature melt light metals
  • Plaster
  • Gypsum
  • Concrete

Useful temperature range for molds: from -53°C to +232°C / from -65°F to +450°F.

Check FAQ for more detailed information (materials to be used with the molds, care instructions, etc).

Please, don’t hesitate to contact us if you have any questions!

Additional information




Food Safe


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80 mm (3 1/8"), 100 mm (4")


A, B, C, D, E, F, G, H, J, K, L, M, N, Q, P, R, A thin, B thin, F thin, G thin, P thin, R thin


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