Fluorite octahedrons are an eight sided crystal form which comes in a number of colors. The octahedrons are from Illinois. The size of the octahedron is approximately 1/2" to 3/4" from tip to tip. The color for the fluorite octahedron crystals is usually purple, but may also be violet, or clear. A few other colors are available, for multiple orders. Octahedrons are rare and hard to find. If more than one octahedron crystal is ordered, a variety of available colors will be given. (If you want matching colors, (to make earrings, etc.) be sure to send an e-mail either before or immediately after ordering and we'll do our best.) They are great for mineral collectors. Sometimes one tip of the octahedron will break off and this is a perfect mounting place for glueing to a jewelry mounting. Check out the Grab bag special which contains one octahedron plus more mineral samples.