ITEM DETAILS - sizes may vary because its natural gemstones made by nature sizes are around 0.25-0.50 inches (5-8 mm) Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, and has often been used for hardstone carvings, such as the Lothair Crystal. Common colored varieties include citrine, rose quartz, amethyst, smoky quartz, milky quartz, and others. ~ Healing ~ Harmony Energy Psychic abilities Clarity Healing Calmness Clear Quartz is known as the "master healer" and will amplify energy and thought, as well as the effect of other crystals.