Glittering Stones >> Precious Stones >> Ruby
Precious Stone Ruby
A Ruby is a red variety of the gemstone corundum.
The color is caused mainly by chromium. They are mined in countries like
Africa, Asia and Australia. Rubies are most often found in Myanmar, Sri
Lanka and also at Thailand,
though they have also been found in Montana and South Carolina; rubies
are exceptionally rare, though artificial ones could be manufactured.
Sometimes spinals are found along with rubies in the same geological formations
and usually are mistaken for the more valuable gem.
 |
Historical Facts of Ruby
| Refractive index |
1.762 - 1.770 |
| Mohs Scale hardness |
9.0 |
| Chemical Composition |
AL2O3 |
| Crystal Group |
Hexagonal |
| Crystal system |
Trigonal |
| Density |
4.0 |
| Luster |
Vitreous |
| Sign of the Zodiac |
Leo |
| Month of the year |
July |
| Planet |
Sun |
| Color |
Red, may be brownish or purplish |
| Occurrence |
Myanmar, Thailand, Sri Lanka, Tanzania, Kenya,
Madagascar, Cambodia, U.S. states of Montana, North Carolina,
South Carolina |
|
Precious Stone Ruby Jewelry
|
|
