Anhydrite, including Angelite, is an inherently unstable stone. When anhydrite is exposed to water, it transforms into gypsum (although it can be transformed back by heating it to 200 degrees Celsius).
Anhydrite is formed in places where gypsum stones that had previously been in contact with water, which then evaporates, leaving anhydrite crystals behind.
Measurements of this palm stone are approximately: The length of this Angelite Palm stone is 2.5 inches, and the width is 1.5 inches. You might not receive the exact stone that you see in the picture, but one similar. Also, the acrylic stand is not included.