Eric Walker added Why Geology Is Our Destiny - The New York Times to Gemstones and Minerals and gems

Eric Walker added r/geology - Can anyone tell me what kind of rock this is? to Minerals and gems

Eric Walker added r/gifs - Angel aura amethyst cluster to Minerals and gems

Eric Walker added a number of links to Quartz, and added Quartz to Silica and Minerals and gems

Eric Walker added Hydrohalite and Halide mineral - Wikipedia and Halide - Wikipedia to Halide minerals, and added Halide minerals to Minerals and gems

Eric Walker added Pyrite to Iron sulfide, and added Iron sulfide to Sulfur, Minerals and gems and Iron

Eric Walker added a number of topics and a number of links to Mines and mining, and added Mines and mining to Industry and manufacturing and Minerals and gems

Eric Walker added a number of topics and a number of links to Atoms, molecules, chemicals, minerals, materials and compounds, and added Atoms, molecules, chemicals, minerals, materials and compounds to Nature

Eric Walker added a number of links to Ochre, and added Ochre to Minerals and gems

Eric Walker added Diamond and Jade and Why Geology Is Our Destiny - The New York Times to Gemstones, and added Gemstones to Minerals and gems

Eric Walker added a number of topics to Iron oxides, and added Iron oxides to Oxidation and oxides, Minerals and gems and Iron

Eric Walker added Chromite to Iron chromium oxides, and added Iron chromium oxides to Iron oxides, Minerals and gems and Chromium

Eric Walker added Petoskey stone - Wikipedia and r/geology - Polishing a bomb Petoskey Stone from Michigan!! Gonna take time to perfect it. to Petoskey stone, and added Petoskey stone to Minerals and gems

Eric Walker added a number of topics to Natural resources, and added Natural resources to Nature and Industry and manufacturing

Eric Walker added a number of topics and a number of links to Minerals and gems, and added Minerals and gems to Geology, Natural resources and Atoms, molecules, chemicals, minerals, materials and compounds

Eric Walker added a number of topics and a number of links to Geology, and added Geology to Science, engineering, mathematics and the humanities

Eric Walker added a number of topics to Silicates, and added Silicates to Silicon and Minerals and gems