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The Moonstone Opal (simply called "the Moonstone" or, "the Stone") is a supremely powerful, ancient opal gem that had descended to Planet Earth from a single drop of pure moonlight, thousands of years ago, along with its heavenly counterpart of healing and light: the now powerless and useless golden Sundrop Flower. The moonstone has two incantations, the decay incantation and the black-rock incantation.

Its destructive powers cause death, ruin, decay, disintegration, nothingness and destruction to those around it, enough to render an entire kingdom uninhabitable and devastated. As with the mystical yellow Sundrop Flower, its powers can be activated only by singing the decaying incantation. As such it's the embodiment of death-force itself.

Since forming the unnamed dark kingdom to further horde and exploits its evil powers to those around it, the Opal resided in a special chamber, waiting to reunite with the Sundrop Flower's new form.

In an unexpected twist, the Opal has allowed itself to merge with Cassandra's entire body; resting on the upper center of her chest, glowing a light shade of moonlight blue.

According to Adira, in order to neutralize the dangerously destructive and potentially deathly effects of the Moonstone, it must reunite with the Sundrop.

Now that it has an earthly host capable of handling its supreme powers, it enables Cassandra to wield and reshape its defenses however she sees fit. However, when directly clashing with an additional spell of the reborn Sundrop Flower, a fragment comes off it and disappears to parts unknown.


Season Two

Season Three

Heavenly Powers and Effects

Decay Incantation: When one recites said spell of decay and destruction, it causes death and ruin to those all around it, from plants to living beings. At one point, it seemed to overpower the Sundrop itself, as it was able to turn Princess Rapunzel's unnaturally long blonde hair (from which the Sundrop Flower's powerful magics of healing, light and life now flows) as well as her eyes black.

Black-Rock Incantation: With this secondary spell of pure shadow at her disposal, Cass has complete control over the moon rock spikes and can reshape them to make anything she desires, from cages to an entire tower and throne.

About the Moonstone Opal

Twenty-Five Years Ago

  • "This Stone has destroyed too many lives!!"
  • "You know the Stone cannot be destroyed!!"
  • "It cannot be destroyed. Our only hope is to keep its power from the world."
  • "Anyone who seeks out this Opal must be stopped."
  • "The Stone and its destructive power must be kept safe from the world."
  • "It's real, Hector, and its power could neutralize the Moonstone!!"
  • "May this place, and the accursed power that lies within, be forever wiped from existence."

Season Two

  • "No, not the Sundrop. The Moonstone."
  • "The Sundrop's power was to heal. What's the Moonstone's?"
  • "You and the Brothers spent yours hiding something no one was even looking for!!"
  • "The Moonstone has the power to destroy the world!! Keeping its existence secret was the King's wish!!"
  • "The Sundrop and Moonstone fell to Earth; two elements longing to reunite."
  • "One must unite the Sundrop and Moonstone to summon the ultimate power. The fourth piece of the scroll reveals the instructions how to wield that power."
  • "Why don't we just leave the Moonstone alone, right?"
  • "If the Moonstone does not unite with the Sundrop, the Black Rocks will reawaken and will seek you out forever."
  • (concerned) "What does the Moonstone do?!"
  • "Demanitus said that if I don't touch the Moonstone, the Black Rocks will destroy everything. But I have no idea what to except to happen to me when I do."
  • "Once upon a time, a single drop of moonlight fell from the Heavens, and from this small drop of moonlight formed a single seductive opal stone. It had the ability to destroy any and all who would seek to possess it. Centuries passed. This Opal's defenses spread and, from that, grew a kingdom; a kingdom founded by our ancestors. Generation upon generation of our bloodline have stood guard here, helping to protect the world from the Opal's limitless power."
  • "But it was Edmund, the last of the Dark Kings, who tried to end this legacy and destroy the Stone."
  • "I sent my most trusted soldiers out into the world to ensure that this power be kept a secret; for if it ever fell into the wrong hands, it would mean certain doom."
  • "I'm certain that bringing the Sundrop to the Moonstone will neutralize its threat."
  • "You mean if Rapunzel touches the Moonstone, she could..."
  • "It's the Moonstone!! It must know the Sundrop is close."
  • "So long as she stays away from the Moonstone, she will be."
  • "You wind up here, in front of me, with this weapon that could actually have the power to destroy the Moonstone!! We shall destroy the Moonstone together."
  • "Leading you here to put an end to the Moonstone. It can get into your head, fill it with thoughts. That's what it's doing to your friend. That's what it did to me."
  • "Perhaps it is not Rapunzel's destiny to grab the Moonstone but yours, to save her from doing so."
  • "I know we brought Rapunzel here to grab the Stone, but everything...everything is different now."
  • "The last time someone tried to destroy the Moonstone, I lost my mother."
  • "Then we must get to the Moonstone first."
  • "There it is, Son: the Moonstone! No longer shall its burden fall upon us."
  • "We have to get to that Moonstone soon!"
  • "Only the Sundrop can access the Moonstone's great power."
  • "The Moonstone knows I'm close!!"
  • "We have to get to that Stone!!"
  • "But, the Moonstone must be destroyed, Son!!"


  • "No!! My power!! I don't need my powers to defeat you."

Season Three

  • "Cassandra, you got to give me the Moonstone!! It is too dangerous!!"
  • "Release the Moonstone, Short Hair!!"
  • (unusually cheery) "The Moonstone's gone!"
  • "I'm here to help you master the Moonstone's power. It responds to hatred and anger. If you truly want to wield the Moonstone, you mustn't be afraid to tap into the depths of your deepest rage."
  • "But she has already stolen some of your power."
  • "When Rapunzel touched the Moonstone's black rocks, they gave her some of their protective power."
  • "So that power that she took belonged to the Moonstone."
  • "And the Moonstone belongs to you. So, you see, even the full powers of the Moonstone are not completely yours."
  • "I thought that by taking the Moonstone my destiny would become clear."
  • "You must wield the powers of both the Moonstone and the Sundrop."
  • "Those incantations were our only hope of unlocking the power of the Moonstone."
  • "When Rapunzel comes for you, you must be prepared to protect what is rightfully yours."
  • "You will face her with the full power of the Moonstone."
  • "The Sundrop must use it against the Moonstone."
  • "You mean the Mind-Trap that controls the minds of those who've sworn loyalty the Moonstone, like the Brotherhood?"
  • "When the eclipse comes, I shall draw the powers of the Sundrop and Moonstone to myself."
  • "Cass has the Moonstone, the Brotherhood, under command now."
  • "Give up the Moonstone. Together we can unite it with the Sundrop and put an end to all of this right now!!"
  • "When you grabbed the Moonstone before I could, there's a pretty good chance you saved my life."
  • "Our last hope! Do you realize what this is? It's power!! We can use it to fight back against Zhan Tiri!"
  • "You can use it to fight Zhan Tiri."


  • Since it had descended to Earth from Heaven itself, it had never been coveted by any mortal until centuries later...by none other than a vengeful Cassandra. As such, it resided safely within an ancient chamber designed to withstand its immense heavenly powers of death and darkness. It is now one with the former loyal, once devoted handmaiden; being embedded on her chest, glowing light blue.
  • In Tinkerbell and the Lost Treasure, the anciently powerful Moonstone is a dark blue glassy orb, from which light blue fairy dust is created during the eight-year Autumn Revelry. Only one exists after three centuries.
  • Some fans refer to it as "the Moondrop Stone" or "the Moondrop Opal"
  • In the third half of the ancient scroll, it is drawn near a hooded man.
  • In a nightmare of Captain of the Guards, hours before he resigned, he had easily shattered it; therefore rendering his adopted daughter completely powerless.