Final answer:
The sorority gems include pearls and rhinestones. Pearls are natural gems formed by mollusks, while rhinestones are faceted glass imitations commonly used in jewelry and decorations for their glittering effect.
Step-by-step explanation:
The sorority gems include pearls and rhinestones or other types of sparkly stones, which may be used for their ornamental value in jewelry and decoration. While pearls are natural gems produced by mollusks, rhinestones are faceted glass imitations that mimic diamonds, which are much-loved for their shine and are often used in costume jewelry. Gems like pearls, rhinestones, and Swarovski crystals are all elements used to adorn various items ranging from personal accessories to elaborate outfits.