Turn This Crystal 90° and It Changes From Sapphire Blue to Water-Clear Yellow: The "Viking Sunstone" (Iolite), Why Tourmaline Turns Pitch-Black From the End & 8 Pleochroic Gems
“Rotate a Viking Sunstone (Iolite) by 90° and watch a deep sapphire-blue crystal turn water-clear yellow in your hand!”
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Rotate a Viking Sunstone (Iolite) by 90° and watch a deep sapphire-blue crystal turn water-clear yellow in your hand! Discover why green Tourmaline turns pitch-black down the c-axis, why Andalusite flashes green and red at once, and test 8 pleochroic & 2026 IMA crystals in 60FPS.
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