Amethyst is the violet sister gemstone of the golden-colored citrine quartz. It is one of the valuable gemstones, which belong to the quartz minerals group, with an exception to rare green-blue gemstone named silica.
Diamond mining causes major changes to the land resources surrounding the mines. Large pits dug for mining also lead to soil erosion, deforestation, and relocation of large communities.
Emerald diamond cut has been one of the most popular ones since the 1920s. Still, new buyers of diamond engagement ring emerald cut tend to mistake it for the emerald gem.