This is an irregular piece of Tiger's Eye which has been polished and fitted to be used as a keychain. Pieces may differ slightly from the one pictured above.
Tiger's eye is a chatoyant gemstone that is usually a metamorphic rock that is a golden to red-brown color, with a silky luster. A member of the quartz group, it is an example of pseudomorphous replacement by silica of fibrous crocidolite (blue asbestos).
Dimensions below are for the crystal only, the chain length of the fitting is 6 cm.