Touch of Topaz

Somatosensory system

The somatosensory system, or somatic sensory system, is a subset of the sensory nervous system. The main functions of the somatosensory system are the perception of external stimuli, the perception of internal stimuli, and the regulation of body position and balance (proprioception). It is believed to act as a pathway between the different sensory modalities within the body.

Topaz

Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al2SiO4(F, OH)2. It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden-brown to yellow-orange. Topaz is often treated with heat or radiation to make it a deep blue, reddish-orange, pale green, pink, or purple.

touch

Verb

1. Primarily physical senses.

Noun

1. An act of touching, especially with the hand or finger.
2. The faculty or sense of perception by physical contact.

topaz

Noun

1. A silicate mineral of aluminium and fluorine, usually tinted by impurities.
2. An often clear, yellowish-brown gemstone cut from this.

Adjective

1. Of a yellowish-brown color, like that of the gemstone.