Jade Info

Learn from Jade Experts

Mason-Kay Jade Jewelry has been in business since 1976. Our business continues to thrive because we guarantee that the jadeite jade we sell is natural and untreated (free of dyes, polymers, and other treatments.)

Owner Jeff Mason, GIA G.G., is an expert in testing and valuing jadeite jade and has contributed his expertise to multiple prestigious platforms, including International Colored Gemstone Association's InColor magazine (winter 2020 issue) and Lotus Gemology's Jade - A Gemologist's Guide, solidifying his position as a recognized authority in the field.

  • Click here if you have jade to sell.
  • Click here if you are interested in our Jade Testing or Jade Valuation Services.

Check out the links below to learn about types of jade, colors of jade, and jade treatments.

  • Jadeite vs Nephrite

    There are two gemstones gemologically considered "jade" in the USA: Nephrite Jade and Jadeite Jade, also known as fei cui (翡翠).

    Learn More 

  • Natural Vs Treated Jade

    While gem-quality nephrite jade is rarely treated, the vast majority of jadeite jade on the market is treated with a combination of dye and the impregnation of polymer, wax or resin. Be warned of treated jadeite jades, particularly 'B Jade' and 'B+C Jade' posing as natural 'A' jade.

    Learn More 

  • Jade Value by Color

    Green is the highest valued color of jadeite jade, followed by lavender. However, it's important to understand that price is not solely determine by color alone - but also quality factors including translucency, texture and cut.

    View our Colors of Jade chart 

The Mason-Kay Blog

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  • Jade Stone Care

    Jade Stone Care

    Jadeite jade and nephrite jade are two of the toughest gemstones in the world. Medium to high qualities of both jades are harder to break than diamonds, and both jades...

    Jade Stone Care

    Jadeite jade and nephrite jade are two of the toughest gemstones in the world. Medium to high qualities of both jades are harder to break than diamonds, and both jades...

  • imperial jade

    Imperial Jade Defined

    We often get the questions: What is imperial jade? How much does imperial jade cost? “Imperial” is a trade term, so it’s not strictly scientifically defined or regulated by the...

    Imperial Jade Defined

    We often get the questions: What is imperial jade? How much does imperial jade cost? “Imperial” is a trade term, so it’s not strictly scientifically defined or regulated by the...

  • Black Jade: The Secret of Black Jadeite Jade

    Black Jade: The Secret of Black Jadeite Jade

    When it comes to China, we think of yellow as the imperial color – but you may be surprised to know that this wasn’t always the case. Emperor Qin Shi Huang...

    Black Jade: The Secret of Black Jadeite Jade

    When it comes to China, we think of yellow as the imperial color – but you may be surprised to know that this wasn’t always the case. Emperor Qin Shi Huang...

  • Top 3 Reasons to NOT Buy Treated Jade

    Top 3 Reasons to NOT Buy Treated Jade

    What is “treated jade?” Genuine jadeite jade can be treated in many different ways. The term “treated jade” encompasses an array of treatments including dying, polymer-impregnation, resin-coating, doublets and more....

    Top 3 Reasons to NOT Buy Treated Jade

    What is “treated jade?” Genuine jadeite jade can be treated in many different ways. The term “treated jade” encompasses an array of treatments including dying, polymer-impregnation, resin-coating, doublets and more....

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