This property defines the Unicodes which belongs to Alchemical block
Characters like 🜀,🜁,🜂, etc. are listed under Alchemical Block.
125 Characters are present in Alchemical Block starting with the Unicode point U+1F700 that represents the character 🜀.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.