Handmade connector set. Approximately 6mm fluorite is used. Natural stone Fluorite 64-facet cut The color appears darker in the image, but it's a slightly lighter shade in person. The 9-pin is K16GP. This is a handmade item created by an amateur. I take care, but there may be small imperfections that I don't notice. Please refrain from purchasing if you are sensitive to such details.