DD IEC/TS 61994-4-1:2007

Quartz - The second most abundant material on earth

Frequency - A term used to describe how often something is done

Frequency - A wave frequency is the number of times a wave repeats within a given time

Components - Multiple items used to complete the product.

Equipment - A product or good that is tactile.

Crystal - A solid substance that has symmetrically carved plane faces and can be regularly found in jewellery.

Crystal - A solid clear substance with many surfaces that glisten, commonly used in jewellery

Crystal - A solid substance with symmetrically arranged planes, commonly found in jewellery.

Vocabulary - The collaboration of words used in a language.

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