These YAG garnets are super sparkly. I bought them to fire in place, because of their similar look to demantoid garnet. Unfortunately when fired you can see that they change from the peridot green colour to the golden yellow colour.
YAG or Yttrium Aluminum Garnet is a lab grown material that was first introduced as being a diamond simulate. Many believe YAGs are the finest man-made material because of the superb brilliance in the resulting faceted gemstones. YAG is also made in different colors to simulate emerald, sapphire, diamond and other gemstones. YAG is a very durable gemstone that has bright color saturation, good clarity and sparkles. YAG is rated 8.5 on the Mohs scale, very durable for jewelry.