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Ruby

Photograph of Ruby under the microscope
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Pearl

Photograph of Pearl under the microscope
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Opal

Photograph of Opal under the microscope
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Sapphire

Photograph of Sapphire under the microscope
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Topaz

Photograph of Topaz under the microscope
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Turquoise

Photograph of Turquoise under the microscope
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Magnetic Field Alignment of the Unwinding Region
Magnetic Field Alignment of the Unwinding Region
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Magnetic Field Effects on Cholesteric Helical Pitch
Magnetic Field Effects on Cholesteric Helical Pitch
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The Black Cherry
Cross Section
Radial Section
Tangential Section
Black cherry is a member of the Rose family