Geode Mold Round, Oval, Irregular Shape

(1 customer review)


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

Silicone geode agate mold for epoxy resin and polymer clay for making round, oval, irregular shape castings. Suitable for creating coasters.


This mold has one cavity in a shape of a round or oval agate cut.

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

  • Round R
  • Size: 115 mm (4 1/2″)
  • Thickness: 8 mm (5/16″)


  • Round R-2 (with a heart-shaped cutout)
  • Size: 115 mm (4 1/2″)
  • Thickness: 8 mm (5/16″)


  • Oval O-4 (without cutouts)
  • Size: 110 x 150 mm (4 3/8″ x 6″)
  • Thickness: 8 mm (5/16″)


  • Oval O-5 (with two heart-shaped cutouts)
  • Size: 110 x 150 mm (4 3/8″ x 6″)
  • Thickness: 8 mm (5/16″)


  • Irregular shape Z-1 (with two cutouts)
  • Size: 113 x 150 mm (4 1/2″ x 6″)
  • Thickness: 8 mm (5/16″)
  • Bigger cutout 30 x 28 mm (1 1/8″ x 1 1/8″)
  • Smaller cutout 28 x 18 mm (1 1/8″ x 3/4″)

Surface: front main surface is glossy. The surface might have small imperfections.

The color of the silicone will be green or blue.


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



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Food Safe








R (Round), R-2 (Round), O-4 (Oval), O-5 (Oval), Z-1 (Irregular)

1 review for Geode Mold Round, Oval, Irregular Shape

  1. MollyWhitebear (verified owner)

    These are the most AWESOME moulds! So well made and sturdy. I love that I can now get them in translucent silicone so I can judge the colours of my resin better! Thank you, Eugene, for such consistently excellent quality in your moulds!

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