Artifact Details Title Silicon crystal Catalog Number 102806912 Type Physical object Description A silicon crystal that is defective due to contamination. This crystal is shaped like a spinning top with points on the top and bottom and a wide circle in the middle. The edge of the circle is uneven. Date c. 1968 Dimensions overall: 3/4 in x 1 1/2 in x 1 1/2 in Credit Gift of Patricia Anderson Lot Number X9296.2020