Dichroic glass is a glass substrate with a specialized, metallic oxide coating which is attached by vacuum deposition onto the surface of the glass. It is angstroms thick, and, when on clear glass, causes light to be split into a transmitted color and a reflected color. The transmitted color is listed first, then the reflected color. So, if the glass is listed as blue/gold, the transmitted color is blue (the color you see when the glass is held up in front of light) and the reflected color is gold (the color you see when light is reflected off the surface). If the dichroic coating is on black glass, it’s still listed as blue/gold, but you won’t see the blue color because there is no transmitted light through the black glass. If there is a texture on the glass, such as granite ripple or radium, the dichroic layer will always be on that side.
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