The Namibian oval is a bit too dark to be optimal. It also has a greenish cast that really does not shout out I am a blue gemstone. Still when it gets it chance to shine in a yellowish light or in the sun, it fires up like champ. It does have a a smidgen of dichroism and is certainly is a beautiful stone for the bright light occasions in your life. It appears to be eye clean and crystal clear. It weighs 3.84 carats and came in a lot with other fortunate tourmaline.