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Garnet mica schist in thin section: This is a microscopic view of a garnet grain that has grown in schist. The large black grain is the garnet, the red elongate grains are mica flakes. The black, gray, and white grains are mostly silt or smaller size grains of quartz and feldspar. The garnet has grown by replacing, displacing, and including the mineral grains of the surrounding rock. You can see many of these grains as inclusions within the garnet. From this photo it is easy to understand why clean, gem-quality garnets with no inclusions are very hard to find. It is also hard to understand how garnet can grow into nice euhedral crystals under these conditions. Photo by Jackdann88, displayed here under a ., Grossular is a calcium-aluminium garnet with the formula Ca 3 Al 2 (SiO 4) 3, though the calcium may in part be replaced by ferrous iron and the aluminium by ferric iron., Garnet refers to a group of minerals that share a common crystal structure but come in a variety of colors and compositions. These minerals belong to the nesosilicate family and have a general chemical formula of X3Y2 (SiO4)3, where X and Y are elements that can vary..
Garnet is the name used for a large group of rock-forming minerals. These minerals share a common crystal structure and a generalized chemical composition of X 3 Y 2 (SiO 4) 3. In that composition, "X" can be Ca, Mg, Fe 2+ or Mn 2+, and "Y" can be Al, Fe 3+, Mn 3+, V 3+ or Cr 3+., It is a rather complex mineral that has a general chemical formula of R3R2 (SiO4)3, where R3 is a bivalent (gives up two electrons) metal and R2 is a trivalent (gives up three electrons) metal when forming a chemical bond., Garnets comprise a group of silicates with the general formula A3B2 (SiO 4) 3 in which A = Ca, Fe 2+, Mg, Mn 2+; B = Al, Cr, Fe 3+, Mn 3+, Si, Ti, V, Zr; and Si may be replaced partly by Al, Ti, and/or Fe 3+., Garnet is a rather complex mineral that has a general chemical formula of R3R2(SiO4)3, where R3 is a bivalent (gives up two electrons) metal and R2 is a trivalent (gives up three electrons) metal when forming a chemical bond., Garnets have the general chemical formula A 3 B 2 Si 3 O 12, where A is a divalent cation (Fe 2+, Ca 2+, Mg 2+, Mn 2+) and B is a trivalent cation (Fe 3+, Al 3+, Cr 3+)., .