Chrome is a special variety of green tourmaline that owes its vivid green hue to trace amounts of chromium and vanadium. It should not be surprising, therefore, that the finest chrome tourmaline ten

Chrome refers to the element chromium. The metal itself is not used as a solid but is always electroplated onto another surface, such as steel, aluminum, copper, brass, stainless steel or plastic, a

Recently, three British inventors extract the carbon black from discarded tires. The carbon black, which has low price, may be used as a printing ink coloring of special carbon black substitutes. T

Ethylene is a gas that is one of the most basic types of hydrocarbons. Its simple structure consists of two carbon molecules bonded with four hydrogen molecules, giving it a molecular formula of C2H

Some soapmakers which make and sell soap better than store-bought said like this while being asked: "Because of the natural glycerin. It is a humectant, meaning it attracts moisture to you

Copper may be tough, but it's also temperamental and changeable. It is an active metal that oxidizes quickly. This oxidation causes a bright new copper penny to quickly turn a dull brown, and an

Tetrahydrofuran, or THF is a colorless, volatile cycloaliphatic ether with an odor characteristic of acetone. It is chemically neutral, highly polar and miscible with water. Synthetically derived T