Alexandrite Buying Guide
Vivid color change makes alexandrite one of the world’s most coveted stones. Our alexandrite buying guide can help you find the best gem for your budget.
5 Minute Read
Alexandrite Buying and the Four Cs
Color Change in Alexandrite
By day, alexandrite should be emerald green to peacock blue. By night, a ruby red or amethyst hue. The intensity of this color change is the most important factor in alexandrite price. Still, intense and complete color changes occur rarely in this stone. Most alexandrites appear muddied in one type of lighting. Thus, the most prized stones undergo a complete shift from lovely green to luscious red. For example, watch the transition of this platinum ring with alexandrite, green sapphires, and diamond accents.
This alexandrite starts green in daylight, then shifts to a deep red in incandescent light. Video © J. Grahl Design. Used with permission.
Some gemological laboratories quantify this shift by a percentage. A 100% change means that the entire stone undergoes color shift. Most high-quality alexandrites exhibit 85-95% change, meaning that some facets don't change color. However, these results are difficult to reproduce because of the lack of standards in lighting and...
A geologist, environmental engineer and Caltech graduate, Addison’s interest in the mesmerizing and beautiful results of earth’s geological processes began in her elementary school’s environmental club. When she isn’t writing about gems and minerals, Addison spends winters studying ancient climates in Iceland and summers hiking the Colorado Rockies.
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