spessartine garnet mineral samples

adornment aggregate almandine carat colophonite crystal crystalline crystallography diamond dodecahedron garnet gem gemmy gemology gemstone geology glass granate grossular hydrothermal isometric jewel jewelery jewelry mandarin material mineral mineralogy nesosilicate orange pegmatite rhodolite rhombs sample semi-precious silicate sparkle specimen spessartine spessartite tanzania tchermigite transparent valuable