Optical Calcite 2.3" Palm Stone #LV8900Size: 2. 3", Approx. 83g The color is very translucent and may exhibit some rainbows when held to the light. These types of stones are particularly good for meditation. Optical Calcite in particular is known to assist one in "seeing" the truth in any situation. These are all "one of a kind" pieces no two are alike and they are irregularly shaped. It is VERY IMPORTANT that you cleanse Ice Calcite before using it simply run it under cool water for a