DIY Temperature Control using a PID control and a solid state relay. Category. License.
The difference between regular shungite and elite or noble shungite is in the proportion of organic carbon in it. Regular shungite contains from 35 to 60 per cent of organic carbon while the percentage of carbon in elite shungite is much higher and totals from 92 to 98 per cent.
Jadeite and nephrite are the materials that have been collectively known as jade for thousands of years. Green Jadeite Buttons: Hand-made, antique Chinese jadeite buttons showing the typical color quality green jadeite.