The Tabby Crystal is recognized as a flat crystal with "notches" on one or both of the flat sides. Rubbing the fingernail in the "downward" motion across the notches [major striations] of the tabby produces an "opening" of the crystal. This opening is similar to opening a file drawer; one can access the information which the tabby contains. Closure of the "file drawer" is attained by rubbing the fingernail in an "upward" motion across the notches of the crystal. In addition, this crystal is used to activate other crystals and minerals; one way to accomplish this is to hold a tabby in the "hand of preference" and to rub the tabby across the notches [in a downward motion]. while holding the other stone in the other hand.