What causes color change in gemstones?
Each light source has a different wavelength and causes colors to absorb differently on the same material. Natural light sources (sunlight) will make certain gemstones appear as one color and that color will change if illuminated by artificial light sources (candle light, incandescent light, fluorescent light).
What gemstone changes green to blue?
Color change fluorite is a striking gemstone that transitions between vivid shades of blue turquoise or blue-lavender. Or, when viewed under bright natural light this gem appears an intense blue or blue-green. For this reason, it has been called one of the most colorful minerals in the world.
Do gemstones fade?
Gems That Fade
Morganite and Kunzite are often referred to as “evening gems” as their colors are delicate and sparkly and look good at night. Worn in daylight, however, they can slowly fade. Amethyst can also lose its color but is more stable than rose quartz.
How can you tell if a stone is alexandrite?
The first way to check if the stone you have is in fact a real alexandrite is to test the color change in different lighting. In bright light, it should appear emerald green and in dim light, it should look red or purple. If this is not clearly visible, you may not have an alexandrite.
Does fake alexandrite change color?
Most gemstones described as synthetic alexandrite are actually simulated alexandrite: Synthetic corundum laced with vanadium to produce the color change. … The material shows a characteristic purple-mauve color change which, although attractive, differs from alexandrite because there is never any green.