Highly valued as gemstones, emeralds are a grass-green variety of beryl. The capacity of emeralds to deflect light and to break white light into its component colors is not high, so cut stones display little brilliancy or fire (flashes of color). The color that gives this gem its value comes from the presence of small amounts of chromium. The most important production of fine-quality gem material is Colombia; emeralds are also mined in Russia, Australia, South Africa, and Zimbabwe. Synthetic emeralds are identical to natural crystals and may rival them in color and beauty.
1 One of the primary reasons why BMI is a flawed measurement tool is that it uses weight as a measure of risk, when it is actually a high percentage of body fat that makes a person obese.  Many experts are now leaning toward body fat percentage as the most accurate measure of obesity.
The BIOS enables us to identify what hardware is on the system and what device drivers to use. When the CMOS battery is weak, the BIOS loses data and the computer can start to malfunction. Letâs take a look at a few signs of a CMOS battery failure.1  Incorrect computer date and time settings. 2  Also, the date/time keep getting reset even after you fix them in the BIOS. 3  This is the most common CMOS battery failure sign.he BIOS enables us to identify what hardware is on the system and what device drivers to use. When the CMOS battery is weak, the BIOS loses data and the computer can start to malfunction. Letâs take a look at a few signs of a CMOS battery failure.