The most exotic material in the Fenn Cache is the Quartz crystal. This material has turned up in the form of Clovis points from coast-to-coast in the United States. So for either esthetic (beautiful), or for some other reason, this glass-like material was popular among Paleo-Indian tool makers. These three Clovis points were found in the Fenn cache. They are all made from Quartz crystal that is slightly smoky. All three points are described as possibly having been resharpened. The longest point measures 4 inches (10.1 cm) long.