Several other well known gemstones, including diaspore, sapphire, garnet and spinel may also change color as a function of the light source but the color change of top alexandrites is distinctive and attractive under any light conditions.
An aluminum oxide, it occurs as shapeless grains and masses (emery), rhombohedral crystals. Ruby contains traces of chromium oxide, when red and Fe2O3, which modified the color. The color of sapphire results from a combination of titanium and iron oxides,
Search results for "color change gemstone gemstones alexandrite color alexandrite award vintage alexandrite ring art deco alexandrite ring gemstone chrysoberyl natural alexandrite color change gemstones malaya garnet Malaia garnet Colour change garnet synthetic alexandrite Zandrite Usambara effect Alexandrite Effect color change tourmaline sapphire color change sapphire color change alexandrite ring alexandrite jewellery alexandrite value appraiser"