which has seams of Human Hair Extensions precious opal. The play of color in opal in matrix appears as pins or dots of colors that contrast beautifully against its dark-brown to black body color. Opal in matrix gemstones can Wigs be found in Honduras and are also therefore traded as "Honduran black opal". Opal in matrix gemstones are generally cut as cabochons.Pietersite is a Hair Weave rare dark-gray, midnight-blue.