WITH POSITIVE QUARTZ INCLUSIONS
Also called manifestation quartz, this variety consist of quartz crystals
included in clear quartz. In normal conditions, if a quartz is included
in an other quartz crystals, they become one and no trace of the interior
is visible. The process because a clear quartz crystal become visible inside
another clear quartz crystal is not totally understood.
Most of the material used for make gemstones comes from Brazil, but
many localities around the world have produced nice specimens.