Tag Archive for ruby

Leo Birthstone – Ruby

ruby

previous sign calendar months(July 23 – Aug 22) next sign Ruby fact file Crystal Structure: hexagonal Chemical Composition: corundum – aluminum oxide (Al2O3) Hardness: 9 MOHS Refractive Index: 1.762 to 1.77 Colors: shades of red, orange- red, or purple red…

July Birthstone – Ruby

ruby-birthstone

previous month zodiac signs next month Ruby fact file Crystal Structure: hexagonal Chemical Composition: corundum – aluminum oxide (Al2O3) Hardness: 9 MOHSRefractive Index: 1.762 to 1.77 Colors: shades of red, orange- red, or purple red Ruby is the July birthstone.…