Black Kyanite is a protective stone. It is also one that gives your mind time to slow down and relax since you are so well protected from harm. These are treated to get that rainbow effect. Check the sizes next to a quarter, which is approximately one inch. The picture shows the quality of the fan you will receive. Individual colors may vary. The price listed is for one lot of 20 grams. One lot gets you 2-4 pieces based on weight.