Jade is an ornamental stone. The term Jade is applied to two different metamorphic rocks that are made up of different silicate minerals:

Nephrite consists of a microcrystaline interlocking fibrous matrix of the calcium, magnesium-iron rich amphibole mineral series tremolite (calcium-magnesium)-ferroactinolite (calcium-magnesium-iron).

The middle member of this series with an intermediate composition is called actinolite (the silky fibrous mineral form is one form of asbestos).

Higher iron content makes the colour greener.
Jadeite is a sodium- and aluminium-rich pyroxene.

The gem form of the mineral is a microcrystaline interlocking crystal matrix.

Ancient people thought that wearing jade would increase body strength and add longevity.

Jade is an ancient symbol of love and virtue.

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