- Brand: Casa de plata
- Product Code: CSER-176
- Availability: By Order
Amethyst is one of
the most precious and valuable stones belonging to the quartz group of
minerals, with exception to rare blue-green gem silica. It is recognized as the official birthstone for the month of February.
Amethyst belongs to the microcrystalline branch of quartz and owes its
violet/purple color to iron and aluminium impurities. Without such colouring
agents, amethyst would simply be transparent, ordinary colourless quartz. Like
other varieties of microcrystalline quartz, amethyst has transparent to
translucent clarity and a vitreous luster. Cryptocrystalline varieties of
quartz almost always occur with translucent to opaque clarity