I opened for you this morning the reference guide Gems Walter Schumann which summarizes for us the history of the jewels:. - The faux ruby ring ??gets its name from its red color (Latin Rubeus reddish) and belongs, like sapphire, the family of corundum. Among the different colors ranging from dark red to pink currant, the most sought after is called pigeon blood, pure red with a hint of blue. The color, often unevenly distributed in streaks or tasks, is attributed to the presence of chromium, with a participation of iron in shades of brown. The inclusions are very common. They do not determine the quality of the gem, they guarantee the authenticity of natural faux ruby ring ??compared to synthetic rubies. It is interesting to note in passing the convergence of views between the author, Walter Schumann, recognized expert in the world of gemology and lapidary our friend, Dilip Jindal, who, by tailoring its acquired on the ground knowledge that leads to the same conclusion: the inclusions do not alter the stone and did not do lose value, they authenticate the natural stone. Pierre Bariand (Larousse of Gems) states that the faux ruby ring ??is the only gem whose synthesis was marketed in the jewelry before the twentieth century. (. . . ). To better mimic the rubies, dry frosts are caused intentionally synthetic rubies and dark matter are introduced to more or less of dendrites. The glass of red (due to traces of gold or selenium, sometimes copper or iron) is an imitation standing. In the thirteenth century, Thomas Aquinas says that the fake jewels obtained using crocus of iron. The manufacture of doublets garnet-red glass is recent (eighteenth century): the blades of garnet chosen often contain inclusions needles junction glass-garnet is usually in the round in the manufacture of the late nineteenth and the twentieth century. Two doublets contemporary manufacturing are sometimes offered to tourists visiting Bangkok: a doublet green sapphire displaying a synthetic ruby-colored chevron clearly visible on the table, and a pair of ruby-Thailand synthetic ruby, the latter being particularly convincing, according to the authors. . . .