Microwave Heating Can Make Rubies Redder
Asian Scientist,
Researchers in India have found that microwave heating can improve the color saturation, clarity and luster of rubies.
Microwave Can Improve Color, Clarity And Luster Of Ruby
Tech Times,
Scientists were able to improve the red ruby's color and luster through the use of microwaves.
Microwave Treatment Improves Colour and Structure of Rubies
Azom.com,
Rubies are among the world’s most popular precious gemstones, and are also used in high power switches and sensors.