The Vampire King's Werewolf Bride
Yes, this transparent stone was a glass piece melted and turned into the shape of a pentagon.
Throwing the stone into the fire, Elphaba went on with her chants again. As she chanted, the fire turned fiercer with every passing second before it burst out, almost damaging the sacred lamp pillar.
Elphaba stretched her hand and opened her palm as she still continued to chant her chantings. Soon, a purple stone came flying from the lamp bowl before it rested in her palm.
"It's the blessing of the deity and moon goddess. The divine Amethyst!!! The rarity, the blessing, and a boon to the Werewolf empire!" Elphaba announced in her high-pitched voice.