 SCP-837 is a quantity of brown clay with two anomalous properties. The first is that it neither releases nor absorbs moisture. Exposures to heat or water have not materially altered its composition, retaining its level of ductility, malleability, and texture. The second property is its unusual reaction to being separated and combined. While both of these occur as easily as with normal clay, the results are non-arithmetic. When two pieces are combined, the resulting quantity is both larger and heavier than the individual pieces. When two pieces are separated, the resulting quantities are much smaller and lighter than they should be. Measurements have shown that each quantity is an integer number of grams. An imperial unit of weight equal to one-sixteenth of an ounce, or 1.8 grams at standard gravity.