Thank you for viewing! ◎ I hope this power stone will encourage you in some way. ◎ If you are interested in this stone, or if this product has caught your eye, I believe it is fate. Fluorite, approximately 9.5mm Purified. Size: Inner diameter approximately 16cm Uses transparent Ope-lon rubber (4 strands) Mixed Fluorite (Made in America) Fluorite is sometimes called the "stone of genius." It works to free you from fixed thought patterns and suppressed emotions, enhancing the free and innocent ideas and thinking abilities of childhood. It is also a stone that enhances clarity and memory, and is said to relieve mental fatigue when studying for exams, and to illuminate the way to a solution for those who are troubled or lost, as if clearing away the fog in front of them. Please understand that this is handmade. We look forward to your purchase. Also, as natural stones are used, please understand that there may be variations in color and shape, as well as distortions, cracks, and inclusions (internal inclusions).