Lapis Lazuli coarse sand is prepared by crushing and milling Lapis Lazuli gem grade rocks. The particle size is in the range from 200 microns to 2 mm. Fine particles <200 microns and very large particles >2 mm are removed. The sand is washed and air dried.
particle size >200µ
Natural pigment suitable for icon painting (egg tempera),
oil painting and watercolor painting without additional grinding.