Value and price of Jadeware is decided by 2 aspects: art and material quality.

Art:

First, look at the integrity/perfectibility of the design and the carving. Missing a part, even a small part would deteriorate the integrity of this jadeware, thus significantly reduce the value.

Second, look at the delicacy and smoothness of the carving, the lines, and polishing condition, etc. 

Third, look if the material is utilized in a way that the design and carving enhance the good part of the rough jade when turning any of the defects (coloring, cracking, etc.) into an advantage.

Material quality:

The quality of rough jade decides mostly the value of finished jadeware. Purity, color, clarity, transparency, oiliness, etc. are key factors of rough jade quality.

For ziliao (籽料 in Chinese) type rough jade, the jade that are found at downstream of a riverbed, skin condition (color, location, thickness, etc.) also is important factor in determining the value of the rough jade, thus the value of finished jadeware.

For a high quality jadeware, the value of the material vs. art is usually 50/50, some might be 40/60 or even 30/70.

Rough jade type:

  1. Ziliao (籽料 in Chinese): this type of rough jade is found at the riverbed of a river downstream, where there is jade depositing at a mountain/land close to the upstream of the review. Ziliao is usually small in dimension with very smooth surface and is high quality, and is the most expensive rough jade type.
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  3. Shanliao (山料 in Chinese): this type of rough jade is mined directly from a deposit location, so it can be large in dimension, but the quality thus the value is perceptually considered to be lower than the ziliao in China market.
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  5. Shanliusui(山流水 in Chinese): this type of rough jade is found at the riverbed of a river upstream, where there is jade depositing at a mountain/land close to the river. Shanliusui usually is bigger than ziliao and has somewhat smooth surface.

Canadian nephrite jade exported to China are categorized as Shanliusui, some are Shanliao.