The Facets of the Silver Crystal: The Museum

TRSE Museum:
Minerals Which the Villians are Named After
Dedicated to the villains of Sailor Moon SuperS.

Coin is for scale.
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Tiger Eye of Amazon Trio.	Tiger eye quartz Brazil .		Hawk Eye of Amazon Trio	Hawk eye quartz, blue variety of Tiger-eye Brazil

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Fish-Eye of Amazon Trio	Fish eye Agate, Found by Jeffrey Anderson Minnesota		Zirconia & Zircon (flying eyeball)	Zircon, red crystal Afghanistan.

The Amazones Quartet (PallaPalla, VesVes, JunJun, & CereCere) are named after the major asteroids of the Solar System.
"Quartet" means four like "Trio" meaning three.

"Nehellenia" is not named after any minerals as according to Dies Guadas

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Sources:
My own comparisons of the names of villains and minerals.
Mineralogy Database
Dies Guadas
Sailor Moon RPG & Resources Book Published by Guardians of Order