Iridescent Acrylic Snowflake Icicle Drop Crystal Hanging Ornaments for Christmas Tree are beautiful and decorative holiday ornaments designed to add a touch of sparkle and elegance to your Christmas tree or holiday decor. These ornaments are typically made from acrylic, a lightweight and shatterproof material. The acrylic is treated to create an iridescent or crystal-like effect, giving the ornaments a dazzling and magical appearance.