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 microcrystalline 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). The higher the iron content the greener the colour.
  • Jadeite is a sodium- and aluminium-rich pyroxene. The gem form of the mineral is a microcrystalline interlocking crystal matrix.

Read more about Jade:  Etymology, Enhancement

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Famous quotes containing the word jade:

    Do not pray for gold and jade and precious things; pray that your children and grandchildren may all be good.
    Chinese proverb.