Gemstones
Ruby
A ruby is a pink-ish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable.
Diamond
The most familiar usage of diamonds today is as gemstones used for adornment—a usage which dates back into antiquity.
Emerald
Emeralds, like all colored gemstones, are graded using four basic parameters–the four Cs of connoisseurship: color, clarity, cut and carat weight.