1 Hardness: cubic zirconia has a rating of approximately 8 on Mohs hardness scale vs. a rating of 10 for diamond. 2  Specific gravity: the density of cubic zirconia is about 1.7 times that of diamond. 3  Refractive index: cubic zirconia has a refractive index of 2.15â2.18, compared to a diamond's 2.42.he synthesized material is hard, optically flawless and usually colorless, but may be made in a variety of different colors. It should not be confused with zircon, which is a zirconium silicate (ZrSiO 4).
When GPS service was first made available for civilians in 1983, for national security reasons, the U.S. military decided to scramble the signal, making it a little too inaccurate to be reliable. This practice, also known as selective availability, was aimed at preventing military use of GPS by the enemies.
But yet again, at war's end, most women were demobilized. Women did not receive permanent military status in the regular and reserve forces of the Army, Navy, Marine Corps and then-newly created Air Force until 1948 when President Truman signed the Women's Armed Services Integration Act.inally in the aftermath of the Spanish-American War, the nation recognized the need for the on-going presence of women military nurses. The formation of the Army Nurse Corps in 1901 and the Navy Nurse Corps in 1908 created the first truly military women.