I see that sometimes you sell unpowered non-electric amethyst mats, do they have healing benefits?

Any amethyst or gemstone mat can be used in unpowered mode. It is still beneficial as the mat can use your own body heat to generate crystal FIR rays or negative ions. It also cools you in summer.

The mat can be recharged by the sun in the summertime. It may be preheated even more than the standard electric mat. 

You can also preheat it with a cheap electric blanket and lay down to sleep on the mat when it’s warm. The stones will retain their warmth until you fall asleep.

Best of all is that these can be used for active exercising, which would damage the heating mats.

Many customers choose unpowered mats for their pets. Cats adore them.