Matte crackle agate black beads in 8 mm are reportedly suitable for anyone looking for protection, who needs to strengthen their determination and overcome obstacles on the way to their goal. They are medium to dark black in colour, though grey is not uncommon either. They are said to have a positive effect on anyone who feels under pressure or is overly sensitive. This mineral reportedly supports stability, regeneration and transformation. It is also considered a stone of protection against ill-wishers. Read more about matte crackle black agate in our article about agate.