These have been stored for 25+ years. I believe this is MOLYBDENITE ON MATRIX, looks like TOURMALINE.
Have not seen anything like this or this large. The item "MOLYBDENITE ON MATRIX SPECIMAN DISPLAY PIECE LARGE PIECE 7 pounds OLD STOCK" is in sale since Wednesday, March 7, 2018. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Crystals". The seller is "debchampion2001" and is located in Courtland, Virginia.This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Philippines, Singapore, Norway, Saudi arabia, United arab emirates, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Viet nam, Uruguay, Dominican republic, El salvador, Belize, Dominica, Grenada, Saint lucia, Barbados, Bermuda, Brunei darussalam, Bolivia, Ecuador, Gibraltar, Guadeloupe, Iceland, Jordan, Cambodia, Cayman islands, Sri lanka, Luxembourg, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Russian federation.