- Brand: Casa de plata
- Product Code: CSBR-6
- Availability: By Order
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.
Labradorite became popular with the missionaries. Labradorite is a plagioclase feldspar which shows adularescence (a white or bluish light seen when turned). This optical effect is so unique to labradorite that it has been termed. It is the result of diffraction of light in the layers of rock. When viewed at certain angles, labradorite exhibits such captivating color that has led to Inuit legends stating that the Northern Lights shone down on the shores of Labrador and were captured inside these colorful stones. The most highly valued labradorite is material that shows the full spectrum of color in its. Labradorite that does not exhibit can still make beautiful gemstones because of aventurescence, which is a glitter caused by diffraction of light from mineral platelets.