Birthstone for the M/o July
Ruby, Turquoise, Oynx are the birthstones of July. Ruby is a precious gemstone. Its colour is red to pink or pink to red. It is a variety of corundum. This is the variety of corundum gems and minerals. The formula is aluminum oxide. Ruby is valuable by price and considered a precious stone. Chromium becomes the cause of ruby color. Ruby is a variety of corundum, the formula of which is aluminum oxide. Why ruby rank high in price among precious stones? Learn here.........
What is Ruby Properties?
Chemical Formula | Al2O3 (aluminum oxide) |
Colour | Red, Pink, Orangish pink, purplish-pink |
Hardness | 9 |
S.G | 3.9 – 4 |
Refractive Index | 1.757-1.779 |
Streak | White |
Crystallography | Hexagonal |
Luster | Vitreous to subadamantine. |
Cleavage | None |
Transparency | transparent to opaque |
Tenacity | Brittle |
Fracture | Conchoidal, splintery |
Pleochroism | strong |
Phenomena | Asterism |
Ultraviolet fluorescence | red under longwave |
Meaning of July Birthstone: invincibility, positivity