AN UNBIASED VIEW OF GLUCOSAMINE CHONDROITIN

Sphalerite crystal partly encased in calcite in the Devonian Milwaukee Formation of Wisconsin The sulfide minerals are chemical compounds of one or more metals or semimetals that has a chalcogen or pnictogen, of which sulfur is most popular. Tellurium, arsenic, or selenium can substitute to the sulfur. Sulfides tend to be comfortable, brittle miner