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.
B. Unakite. Polished gemstones (large cabochon, greater axis - 3.7 cm) fashioned from material from Augusta County, Virginia. This material has a so-to-speak intermediate grain size and contains more epidote per unit volume than the specimen shown in A.