Goldstone - glass gemstones first make in the 17the century!
Goldstone is a man-made colored glass that contains abundant, flat-faced, highly reflective inclusions. Goldstone is produced in a variety of colors. Reddish brown, the original color, made with copper, is most commonly encountered. Dark grey, dark blue, and dark purple goldstone are also produced.Reflections from the metallic crystals within the goldstone attract attention and give goldstone its sparkling appeal. The sparkling appearance of the reflections is intensified in three situations: 1) when the goldstone is moved under incident light; 2) when the light source is moved; and, 3) when the eye of the observer is moved.
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