This quartz crystal contains two internal spaces with moving inclusions. The first is a flattened triangular space in which a black bubble moves (it travels around the triangular area as the crystal is rotated). A moving black bubble in a quartz crystal is not at all common. The second is a larger space in which many black included particles move as the crystal is rotated. I am guessing that the black inclusions in this crystal are hydrocarbons.
The bubble and the moving black particles are all easily visible without magnification, but look super with a loupe. The crystal itself is doubly terminated, sharp and lustrous – in good condition, with chipping at the terminations – however, this specimen is about the inclusions first and foremost, and all surfaces are natural and unpolished. A great quartz inclusion specimen from the John S. White Collection. (The final specimen photo is John’s.)