Obsidian is black mainly because the internal minerals are composed of cryptocrystalline and vitreous, and the phenocryst is composed of white plagioclase. However, obsidian only appears black in natural light, it is actually a yellowish-brown inky gemstone under light transmission, and obsidian is not only black, but also visible in brown, gray and a small amount of red, blue and even green. Obsidian may be entirely monochromatic, or striped, or speckled, and some crystals may produce a "snowflake" effect or be seen as a shimmering iridescence. Obsidian is actually a black gemstone that appears black in natural light, but generally takes on a yellowish-brown inky color when exposed to light.
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Obsidian is a type of black glass.
Obsidian is a volcanic glass formed from rapidly cooled lava, and it typically lacks a layered structure like sedimentary rocks. However, variations in its composition and cooling conditions can create bands of color or inclusions, giving the appearance of layers. These bands may result from different mineral contents or gas bubbles trapped during the cooling process. The most notable types include black obsidian, snowflake obsidian, and rainbow obsidian, each showcasing unique visual characteristics.
obsidian
? Wholesale $.50 A Lb. ? Retail $1.00 - $12.00 a Lb. Obsidian is glass, and the value depends on the color it is and the type it is
Obsidian is usually jet black. However it can also be green, brown, red, blue, yellow or orange due to light inclusions or trace elements. It is an igneous rock that results from lava cooling, streaks can be of any colour depending on the point of origin
obsidian rocks are red and black also sometimes orange
Obsidian is a type of black glass.
burritos
The name of the dense volcanic glass that is typically black in color is obsidian.
Obsidian rock typically appears black, but it can also have a slight sheen and exhibit various colors like brown, green, or red due to impurities or inclusions in the rock.
Obsidian, a naturally occurring volcanic glass, is naturally black in color.
Obsidian because it's the only mineral that is the blackest of well......black! Anyway it's black I mean Obsidian (\_/) (o.o) (___)o
Obsidian is volcanic glass and is found in several colours including - black, grey, dark green, red, yellow and pink. mostly black It is also very sharp; it can be used to make knives
Obsidian is a beautiful rock. It's description is pretty simple, it is a rock that formed out of cooled lava, and is black in color.
Obsidian is typically black, but variations can occur, resulting in colors such as red, brown, or green. These variations are due to the presence of impurities in the volcanic glass.
The rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed during rapid cooling of lava. It is usually black in color and has a smooth, glassy texture.
it's usually dark, a dark green/brown/black....it is not an exact color.