The difference between yellow mouth material and Hetian topaz
Yellow mouth material is topaz, are they a concept? Accurately, the yellow mouth material is not completely Hetian jade topaz, and Hetian jade topaz is not completely yellow.
What is yellow mouth material?
First look at what is yellow mouth material. Yellow mouth material refers to a feature of Hetian jade with a yellow-green tone. "Yellow mouth material" is just a habitual name, just like "salty jade", not a variety of Hetian jade.
What is Hetian jade topaz?
Hetian jade topaz refers to a kind of nephrite with a yellow color or a yellow color. Among the more famous ones are: chicken skin yellow, chestnut yellow, okra yellow, tiger skin yellow, sweet-scented osmanthus yellow and so on. It is affected by the divalent iron ions at the time of formation. It is usually produced along with sapphire or white jade, and its yield is very small.
The difference between the two
Among the yellow mouth materials, only some of the yellowish colors can be called topaz, which is also a major source of topaz. The yellow mouth material is generally produced only in the mines of Ruoqiang, Cele, and Qiemo in Xinjiang, but as the mining time becomes longer, the production of yellow mouth materials is becoming less and less.
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