1 Calories Burned For Treadmill: 10 mph (6 minutes per mile). 2  Calories Burned For Treadmill: 5% Incline, 5 mph (12 minutes per mile). 3  Calories Burned For Treadmill: 5% Incline, 5.45 mph (11 minutes per mile). 4  Calories Burned For Treadmill: 5% Incline, 6 mph (10 minutes per mile).
Well my shoes arrived and as I expected, the posters mentioning the stone and looking it up on Google, all of which I did along with looking at Dictionary .com before posting were completely wrong. Nike's color is very different from the literal description of the color. It is more of a dark gray/blue color.Not black at all, if someone thinks the NIKE version of the color is black then they would think my silver Audi is blue!ell my shoes arrived and as I expected, the posters mentioning the stone and looking it up on Google, all of which I did along with looking at Dictionary .com before posting were completely wrong. Nike's color is very different from the literal description of the color. It is more of a dark gray/blue color.
Obsidian consists of silicon dioxide (Silica) that forms rock. Obsidian is not crystalline and therefore not a mineral. Obsidian forms from volcanic lava that has cooled to quickly for crystals to form. Obsidian is termed a natural volcanic glass and iron and magnesium impurities produce a black or dark green Obsidian. The presence of microscopic bubble patterns cause Obsidian to colour sheen.