Lemuria and Atlantis
It is believed that the Lemurians worked extensively with crystals. When the destruction of their race was imminent, the legend goes that the Lemurians left messages within each crystal and these were programmed before they were placed into the ground.
To activate a Lemurian Seed Crystal, rub your thumb up and down the ridges. The information stored in the crystal will be revealed to you. Some believe that these crystals are either Teacher or Healer stones.
You can also find stones for Atlantis /Atlantean connection in this category.