"Black Opal is a collection of contemporary wines names after the alluring black opal gem found only in Australia. The Cabernet Sauvignon is packed with ripe black cherry characters and a smooth, soft taste - a benchmark wine, Aussie style."
Opal forms from the seasonal rains that drench dry grounds in desert regions. The rain soaks into the ground surface, carrying with it dissolved silica. After the water evaporates, the water imbued silica is left behind, forming opal. There are two types of opal, common and precious. Common opal doesn't have a wide array of fantastical colors and typically can be confused for quartz or chalcedony. The precious type of opal is very different though, with a wide array of colors within a single specimen. Due to the formation of opal, it is often formed as sub-microscopic spheres that are stacked in a grid-like pattern. These spheres bend the light creating the array of colors, known as "play-of-color". The size of the spheres directly relates to the colors that you can see.
|An Australian black opal from Lightning Ridge. Image from Geoscience Australia.
There are many different types of opal depending on the play-of-color that you can see.
- White or light opal has a play-of-color against a white or light grey background.
- Black opal has a play-of-color against a black background.
- Fire opal has a body color of brown, yellow, orange, or red and doesn't typically show a play-of-color.
- Boulder opals have fragments of surrounding ironstone, which become imbued within the gem
- Crystal opal has a play-of-color against a clear background, making the colors most striking.
|A black opal.Image from Opal Galaxy.