Lapis Lazuli sand is prepared by crushing and milling Lapis Lazuli gem grade rocks. The particle size is in the range from 50 to 200 microns. Fine particles <50 microns and very coarse particles >200 microns are removed. The sand is washed and air dried.
particle size 50-200µ
Natural pigment suitable for icon painting (egg tempera),
oil painting and watercolor painting without additional grinding.