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Natural Minerals

This file contains naturally occurring minerals as a function of their optical properties.
(Click here for images of rock thin sections.)

Transpartent, Colorless, Isotropic

Transpartent, Colorless, Anisotropic, Low Birefringence (0.001 to 0.020)

Emery

Emery Emery Emery

(Click here for more images of Emery.)

Feldspar

Feldspar

Quartz

Quartz Varieties Quartz Quartz Quartz

(Click here for more images of Quartz.)

Transpartent, Colorless, Anisotropic, Moderate Birefringence(0.020 to 0.065)

Zircon

Zircon Zircon Zircon Zircon Zircon Zircon Zircon Zircon Zircon

Transpartent, Colorless, Anisotropic, High Birefringence

Transpartent, Pink to Reddish Hue, Isotropic

Transpartent, Redish Hue, Anisotropic

Transpartent, Orange to Yellow Hue, Anisotropic

Rutile Rutile Rutile Rutile Rutile

Transpartent, Greenish Hue, Anisotropic

Tourmaline

Tourmaline Tourmaline Tourmaline Tourmaline Tourmaline Tourmaline Tourmaline

Transpartent, Bluish Hue, Anisotropic

Opaque

Ilmenite



Magnetite

Magnetite Magnetite Magnetite Sphere Magnetite Sphere

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