Glossary – U
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Ultrasonic Cleaner
A devise that cleans jewelry by using a fluid that is vibrated at high frequency. Ultrasonic cleaning does not scratch the surface or harm the items like many chemical or abrasive agents. Some gemstones are not suited to ultrasonic cleaning.
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Unakite
First discovered in the United States in the Unakas mountains of North Carolina, unakite is an altered granite composed of pink orthoclase feldspar, green epidote, and generally colorless quartz.
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