Tourmaline is the Official State Gemstone of Maine because the it was so legislated.
Tourmaline is the Official Maine gemstone.
tourmaline is a complex aluminum and boron silicate mineral
Tourmaline is not a metamorphic rock; it is a crystalline mineral that can be found in igneous, metamorphic, and sedimentary rocks. It forms in a variety of geological environments and is prized for its colorful varieties used in jewelry.
Tourmaline is a group of several different minerals that have similar crystal structures, but complex and variable chemical formulas. This gemstone occurs in almost every color.
Tourmaline is a group of several different minerals that have similar crystal structures, but complex and variable chemical formulas. This gemstone occurs in almost every color.
Tourmaline is the state mineral of Maine.
Tourmaline, it is actually the State Mineral
Tourmaline is the state mineral of Maine.
Tourmaline
Tourmaline is the Official Maine gemstone.
The "state mineral" (state gemstone) is the tourmaline.
Tourmaline was the first gemstone mined in the United States by miners. Tourmaline mining began at Mount Mica, Maine in 1822, and with starts and stops, has continued to the present. Maine designated tourmaline as the official state gemstone in 1971.
tourmaline is a complex aluminum and boron silicate mineral
The tourmaline group (cyclosilicates)
tourmaline
talc topaz tourmaline
Tourmaline crystals can have a streak that ranges from white to colorless. The streak of a tourmaline mineral is usually lighter than its external color.