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Ultrasonic cleaner
A machine that cleans jewelry by using a fluid that is vibrated at 20,000 cycles per second. When the vibration speed rises above the ultrasonic frequency level, bubbles explode and generate strong power, cleaning the surfaces and cavities of hard-to-clean objects. Ultrasonic cleaning does not scratch the surface or harm objects like many chemical or abrasive cleansers.

Unakite
Unakite is an opaque mineral that is green with patches of red and pink. Unakite is a variety of granite that contains green epidote and pink feldspar (but lacks mica). It has a hardness of 6 to 7 and a specific gravity of 2.86 - 3.2. Unakite was named for the Unaka Mountains Mountains in Tennessee, USA. Unakite is found in the USA and Africa.

Uvarovite
Uvarovite is a rare emerald-green Garnet. It is not used a faceted gem because the crystals are too tiny. However, as drusy has come into popular use in jewelry, the stone is cut en cabochon and used in pendants, earrings and pins.

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