These Stone Are made from Natural Stones so there might be a very slight variation.These gemstone sizes(thickness) may appear slightly different from the Natural Stone. It may represent an entire lot of items so the pattern you receive may vary slightly from the one you see above but the healing properties of the product remain the same. Amethyst Tumble Stone Reiki Healing Crystal Stone. For crown chakra. The color of natural Amethyst might vary from lavender to dark violet. But all shades of Amethyst display the same healing properties. Good for focus, concentration, calmness, and thoughts. Amethyst is a stone of Crown chakra. To increase this power and attract good luck. It helps in the assimilation of new ideas, puts thought into action, and brings projects to fruition. It is a talisman of focus and success