Lowest price:$24.99Description: approx 2.70ct 10mm round buff top zandrite(tm). color change. zandrite(tm) is a type of synthetic glass that was created by a major glass manufacturer. a developing scientist came across the idea that the new creation had gemstone marketing possibilities and started a movement that began a new gemstone trend. it has a color change which is why it was given the name 'zandrite' as a take off of the very expensive natural gem alexandrite. it ranks 5 on moh's the same as glass.