4 ranges from Strass Swarovski to lower lead crystal and pressed prisms. All prisms come with a small hole at the top for stringing.
Swarovski - highest grade full leadcrystal ( full rainbow) prisms Star - high quality, same full leadcrystal (full rainbow) prism, without the name. Star Iridescent AB - Star prism with AB (iridescent type) coating over the surface. Nova - good quality, faceted lower leadcrystal (some rainbow) or equivalent.