Polarized Light Microscopy Digital Image Gallery


Unakite is a popular semiprecious gemstone often described as an epidotized granite. It usually appears as a mottled red or salmon pink and green stone. The green hue is attributed to the significant presence of epidote, a yellow-green silicate mineral that is sometimes produced during metamorphism of basic igneous rocks. The pink or red coloration, on the other hand, generally stems from pink orthoclase feldspar and quartz. The unique appearance of the highly polishable rock makes it an interesting choice for beads, jewelry, paperweights, and other ornamental items.

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