Natural African Turquoise Beads Strands, Faceted, Round, Size: about 2mm in diameter, hole: 0.5mm; about 176~200pcs/strand, 15.7 inch(40cm).â African Turquoise is a jasper stone that is mined in Africa. This stone is called African Turquoise as it rich blue-green color and has the similar matrix pattern. African turquoise is actually a much harder stone than traditional turquoise, which makes it great for beaded bracelets that may get abused in day-to-day wear.