Species: Corundum Color: Varying red
Chemical composition: Al2O3 aluminum oxide
Crystal system: (Trigonal) hexagonal prisms or tables, rhombohedrons
Hardness: 9 (Mohs scale)
Specific gravity: 3.97 – 4.05
Refractive index: 1.762 -1.778
Color of streak: White,
Absorption spectrum: 694, 693, 668, 659, 610-500, 476, 475, 468
Fluorescence: Strong carmine red
The Ruby zodiac, myth & legend
For a long time India was considered as the classical source of rubies. In the Sanskrit language ruby is called “ratnaraj”, which translates as “King of Gemstones”.
In ancient times one of the chief attractions of ruby has been its protection from misfortune and bad health.
Ruby is the birthstone for those who are born in July. On the Zodiac chart, ruby is the stone for Capricorn.
Ruby is also used to celebrate a couple’s 15th and 40th anniversary.
In Antiquity, as well as in the Middle Ages people believed that the cosmos is reflected in gemstones. The ruby is assigned to the planets Mars and Pluto. The esoteric movement revived the ancient belief and the gem industry made it another marketing tool to promote certain gems.
The healing powers of gems remain a controversial issue, but are mentioned for centuries by healers, shamans and medicine men. Whether it’s a fact or a placebo effect doesn’t matter, if it helps. The safest approach is to wear the gemstone in skin contact to the troubled part of the body. Ruby is said to be a general health protection and a help for backache and toenail problems.