Alabaster is a semi-crystal of plaster, which is found in tuber forms in soil. It is a transparent type of stone which is, despite its low hardness, very well suited for children in primary classes. The small stones can be treated with just sandpaper. The large stones will be filed first and then finished with sandpaper and wax.

The large stones can be made smaller with an old wood saw. Due to the transparency of the stone, this is excellent for the making of crystalline forms for geology lessons.

The alabaster comes in a solid cardboard box and is available in two sizes (4 kg. or 15 kg.).