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► Approximately 2" 50-60 mm
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► Approximately 3" 70-90 mm
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► Amethyst has the effect and role to promote the brain cells active, natural amethyst contains high energy, can promote the human brain cells can be more active; Enhanced memory, the cortex receives amethyst's energy magnetic field, can help us strengthen our own cognitive abilities; Improve sleep quality; Maintain emotional balance and adjust the mood.