Dims: 5.06x5.04x5.02" (12.86x12.80x12.76cm)
Wt: 41.45oz (1175g)
lab grown, USA
This is the tip of a silicon boule, used to make computer chips. It is perfectly round and the cone shape varies in width in a sinusoidal pattern. The surface of the silicon has striations, caused by uneven pulling rates from the molten silicon bath from which it was grown. It appears to have been pulled exactly a millimeter at a time, and the length of time at each stage determines the width of the resulting boule. It was cut flat at the base but not polished, and there is some damage, probably caused by the discarding of the now usless tip of the boule - the really valuable part is the long uniform width part that they slice into wafers for computer chips.