1. See that different densities lead to different weights of the same volume of purple sand flowerpot. Different contents of oxides and protein in minerals lead to different densities of fired purple sand, and clay such as purple sand is heavier, while the real purple sand mud will form aggregates and bubbles on the inner wall structure after firing, so the density is slightly lower and the hand feel is slightly lighter.

2. Look at the real purple sand flowerpot made of purple clay, just like red bean paste. No matter how fine the purple sand looks, it still has a semi-suspended graininess, and it will not be too smooth to touch, but it will not shake hands. Clay like purple sand feels astringent, while that mixed with chemical materials is too smooth.

3. listening to the sound purple sand is different from porcelain. It doesn't need special glass. After sintering, a layer of attached mud skin will naturally form on the surface, which is impermeable to water but breathable. The sound is not as crisp as porcelain, but it is not dull, while the purple clay is dull.

4. Look at the original purple sand mud with true color. The color is dim and the surface is slightly rough.