The green garnet is of a pronounced green color, and is harder and heavier than the olivine or chrysolite. Although suitable for mounting in brooches and other ornaments, these stones are not sufficiently hard for the rough usage as ring-stones.
Garnet.
Almandine, almandite, Syrian garnet, essonite, cinnamon-stone, pyrope, Bohemian garnet, vermeille, Cape garnet, Cape ruby, Arizona ruby, American ruby, carbuncle, uwarowite, demantoide, grossularite, and Bobrowska garnet are some of the scientific and commercial names for different species and colors of the garnet group.
The crystallization of the garnet is isometric, refraction single, specific gravity 3.15 to 4.3, hardness 5 to 8, lustre vitreous, fracture uneven, colors red, violet, brown, yellow, green, and white, and the various shadings of these colors.
Most varieties fuse easily to a brown or black glass; the uwarowite fuses with borax to a clear chrome-green glass.
Syrian, almandine, almandite, and carbuncle are different names for the iron-alumina garnet.
In colors, these stones shade from deep-red to violet and brownish-red, and are composed of:
| Silica | 36.01 |
| Alumina | 20.06 |
| Protoxide of iron | 43.03 |
The specific gravity is 4. to 4.2, and hardness 7.5.
This garnet, sometimes called the precious garnet, is found in Ceylon, Pegu, Brazil, Greenland, Hindustan, Bohemia, Tyrol, Œtzthal, Carinthia, Styria, Switzerland, Ariolo, Canaria, Maggia, Hungary, Sweden, Norway, Scotland, Spain, and the United States.