* Stone: Polished Opaque Blue Chalcedony Crystal  * Other Names: Speaker Stones * Mohs Hardness: 6.5 to 7 * Colors: Blue, White, Brown, Gray, & Yellow (Not every stone will contain every color or a pattern (Most will)). * Country of Origin: Namibia * Stone Size: Small, approximately 1/2" to 3/4" (Some stones may be slightly larger or smaller (See quarter & ruler pictures)). * Stone Shape: Undrilled, tumbled freeform * Stone Weight: ? * Stone Count: Will vary slightly due to variations in stone sizes (See individual weights for approximate stone count). * Selection Process: Random blind scoop. * Package Weight: We base what is sent on weight.